Prabhavathi (Jyothika) is a feisty, independent woman who makes documentaries. She lives with her 2 friends and later moves in with her future mother-in-law Gomatha (Urvashi). Prabha learns that Gomatha misses her school friends Subbulakshmi (Saranya) and Rani (Bhanupriya), with whom she has lost contact over the years. Prabha becomes determined to reunite Gomatha with her old friends from 30 years ago.

College friends Jenny and Shiva part ways due to a misunderstanding. Although they are in love and realize they cannot live without each other, their egos prevent them from uniting.

An orphan girl, after craving for mother’s love since childhood, starts finding it in an elderly woman, who was abandoned by her own son.

Ganga (Jyothika) lives in a village and secures state second rank in XII board exams. Although she wishes to pursue engineering, her father Veluthambi (Murali) plans to get her married to Adhithya aka Adhi (Madhavan) who also hails from the same village. Adhi is a fun loving person who has just completed his law degree and prefers to enjoy his bachelor life and is not interested in marriage.
Adhi comes to the village and meets Ganga trying to convey his feelings. To his surprise, Ganga also is not interested in marriage as she wants to study engineering. Both of them decide to somehow stop the wedding by creating some problem before the wedding but all their effors go in vain as both the families get even closer following their plans.

Thenali Soman (Kamal Haasan) is a Sri Lankan Tamil who has come to Chennai for psychiatric treatment because of numerous phobias caused by his trauma of the Sri Lankan Civil War. Panchabhootham (Delhi Ganesh) and his assistant (Ramesh Khanna), the doctors treating Thenali, are jealous of a relatively junior doctor Kailash (Jayaram) getting all the media attention. They send Thenali over to him, believing his failure to cure Thenali of his phobias will derail his success. Soon after their first appointment, Kailash heads to his home in Kodaikanal on a vacation with his wife Jalaja (Devayani) and his two children Arjun (Master Suraj) and Aishwarya (Baby Taj Nisha). Kailash tells Thenali to wait until after the vacation before his therapy can begin, but Panchabhootham asks for Thenali to go meet Kailash while on vacation.

Raghuram and Suriya are siblings. Being the youngest child in the family, Suriya is pampered by everyone. Feeling rejected and ignored, Raghuram decides to ruin Suriya’s life.

A hunchback and a local tough have lookalike love-interests.

Two families stay in identical bungalows, adjacent to each other, tracing their friendship to over 40 years. Their respective progenies Chinna (Ajith Kumar) and Chella (Jyothika) are childhood buddies, their easy camaraderie and strong bonding carried over to their adult years. The two study in the same college, same class, zoom together on the motorbike, their togetherness at home and college, as accepted a fact as it was in films like Piriyadha Varam Vendum. Somewhere along the way, the duo falls in love, throwing some soft glances at each other when the other is not looking. Their college mate Karna (Yugendran), makes devious plans to separate the duo and make Chella his. He does not seem to have any running feud with Chinna, is quite friendly with the duo, and does not seem to be particularly in love with Chella. Chinna laps up all that Karna tells him about Chella loving him, and is heartbroken and goes out on a business trip. Chella, persuaded by both families to marry an NRI, boldly informs them that she loved Chinna and would marry him. The two families are happy. Chinna returns home and learns of the preparation for his engagement ceremony. Feeling that since Chella loved Karna, it must be family pressure that must have forced her to agree. Chinna then backs out. It is Chella’s turn to be indignant about Chinna’s mistrust of her love, and after giving him a piece of her mind, she backs out, with Chinna pleading for acceptance. After a period of separation, during which all ties between the two families are severed, Chella’s family soon come to realise that they cannot live without their dearest friends (and lover). The two families then reunite.

Saravanan, a psychiatrist, meets up with his foster brother Senthilnathan alias Senthil, and his wife Ganga while on vacation. Senthil’s mother Kasthuri wanted Senthil to marry Priya, the daughter of his father’s cousin Kandaswamy, to reunite the two branches of the family after 30 years of separation because Senthil’s father chose to marry Kasthuri instead of Kandaswamy’s sister, Akhilandeshwari. Saravanan learns that Senthil had bought the Vettaiyapuram mansion, despite attempts by the local village elders to dissuade them, and moves in with them. Akhilandeshwari is jealous of Saravanan and plots to kill him with the help of her assistant Oomaiyan.
When the family visits their ancestral temple, the chief priest reveals the reason everyone fears the mansion. A hundred-and-fifty years ago, a king named Vettaiyan travelled to Vijayanagaram in Andhra Pradesh, where he met and fell in love with a dancer named Chandramukhi. However, she did not reciprocate his feelings as she was already in love with a dancer named Gunashekaran. As a result, Vettaiyan took her back to his palace by force. Unknown to him, Chandramukhi made Gunashekaran stay in a house nearby and had meetings with him secretly. When Vettaiyan discovered this, he beheaded Gunashekaran on Durgashtami and burnt Chandramukhi alive. As a result, Chandramukhi’s ghost tried to take revenge on Vettaiyan, who with the help of various priests and sorcerers from all over the country, tames the ghost by locking it up in a room located in the palace’s south-west corner. Priya is in love with Vishwanathan, a dance professor who reciprocates her feelings. Their love is supported by Saravanan, who requests Kandaswamy to arrange their marriage.

Aravindan (Vijay), Chandru (Suriya), and Krishnamurthy (Ramesh Khanna) value friendship over everything else, even family. For this reason, Chandru resists the advances of Aravindan’s sister Amutha (Vijayalakshmi). When the trio takes up a painter’s job at a mansion, Aravindan falls in love with Padmini (Devayani), who lives there. Padmini’s jealous cousin Abhirami (Abhinayashree) makes him believe that his overtures are reciprocated. When the truth is revealed and Padmini rejects him, Chandru stands up for his friend and speaks ill of her. This makes her swear to separate the friends.[2] After the marriage, Aravindan realises the hand of Abhirami behind all the mishaps, and Padmini realises that Chandru is innocent. Chandru and Amutha’s marriage is arranged. Gautham (Sriman) is Aravindan’s cousin who is in love with Amutha and wants to separate the pair. He makes Chandru believe that Padmini is trying to kill Amutha. Padmini is angry with Chandru. Aravindan tells the truth that in their young ages, he unknowingly killed Chandru’s deaf and mute brother. Gautham records this and makes Chandru hear it. Chandru and Aravindan fight and go by their ways. Aravindan tries to convince Chandru but falls from the top of a mountain. Chandru believes that Aravindan is dead, but after five years, he finds out that Aravindan is not dead but has ended up in a coma. Gautham is now torturing his family a lot. When he comes to know that Chandru has come back, he starts to beat him up. After hearing Chandru’s cry of pain, Aravindan wakes up from his coma. He beats up Gautham, and everyone rejoins and lives happily.

ACP Anbuselvan succeeds in killing a dreaded gangster but Pandya, the gangster’s brother, kills Maya, Anbuselvan’s wife. Later, Anbuselvan goes all out to finish Pandya and his gang.

Tirupathi (Prabhu Deva), Pazhani (Raju Sundaram) and Chidambaram (Nagendra Prasad) are physically impaired — one cannot see, the second is hard of hearing and the third is mute. None has a family. They are friends who begin to live under the same roof. Narmada (Jyotika) enters their lives and all three fall in love with her. The story follows their attempts to win her hand.

Madhan Kumar (Silambarasan) is a well-respected and well-educated Chartered Accountant by profession, who lives in Chennai and also learns music as part-time in a musical college. Mythili (Jyothika) also learns music from the same college. Mythili gets scared seeing Madhan because once she had a dream of getting raped by him. Later on, she realizes his kind nature and they both become good friends.

Sridhar (Ajith Kumar) is from a middle-class family headed by his father (K. Vishwanath). Shiva (Raghuvaran) is Sridhar’s elder brother and the breadwinner for the family consisting of his wife Shantha (Sithara) and sister (Preitha Raghav). Sridhar, upon completion of his graduation, aspires to become a music director and tries hard to secure a chance in movies, but all his efforts go in vain. Sridhar’s search for a chance continues for 8 years. Despite that, his family members support him very well and encourage him whenever he feels dejected.

Vijayalakshmi Balakrishnan alias Viji is a happy housewife who finds happiness by competing in contests. Despite being belittled by her twin sisters and father, she is happy with her life with her husband Balakrishnan alias Baalu and son Siddharth. One day, Viji takes part in a contest organized by Hello FM celebrating World Tourism Day. She ends up winning the contest. Later, Viji happens to come across a an audition called “Neenagalum RJ Aagalaam”. She signs up and for it and gets the job of a disc jockey who anchors a late-night show.

After the passing away of her parents in an automobile accident, Radhika moves in to live with her aunt, Malathi, and studies Zoology in Lexicon Science College. She is very friendly with Basu Subtankar and both, along with other girls, create quite a ruckus, much to the chagrin of their teachers and the College Principal. In addition to this, they are also staunch rivals of NRI Geetha Damodar, who wants to be the Student Chair. Radhika competes, there is a tie, but the teachers overturn Radhika’s votes due to many complaints against her, and elect Geetha as the Chair. When Malathi wants Radhika to wed, both girls create a fictional character, name him Ramesh, and tell Malathi that Radhika is in love with Ramesh. Complications arise when a real male named Ramesh surfaces, is subsequently killed, and the duo become suspects amidst a web of deceit and lies created by one of four persons in their lives, namely Malati herself, Geetha, a mysterious woman who sometimes poses as Ramesh’s mother and other times as Geetha’s guardian, and an fourth unknown person – leading the duo to a roller-coaster ride with both the police and the real killer on their tails.

Two music directors Bharathi (Vijayakumar) and Kannan (Nassar) used to be friends and composed music together. After Kannan has a fight with the director of their movie, Bharathi who feels embarrassed decided to split from Kannan and compose the music for the film by himself. He offers Kannan the chance to reconcile after this movie. Kannan rejects this and instead gives details about the fallout to the newspaper and Bharathi ends up losing the movie deal. A war begins and both music directors hate each other and can’t even stand to hear the other’s name. Bharathi is very successful while Kannan, who is basically unknown, drinks away his sorrows.

Raghavan, a police officer, sets out to catch a serial killer who killed his friend’s daughter, Rani. As the culprit goes rampant in other countries, Raghavan is forced to go to New York to catch him.

Priya confesses her love to Raja but he mistakenly falls for a girl with the same name. Years later, Priya re-enters his life and triggers a series of emotionally complicated situations.

Unemployed Shakthi Singh lives a poor lifestyle along with his widowed and ailing mother and a sister. His mother falls ill and gets admitted in hospital. While on his way to an interview with HSBC, Shakthi sees a beautiful girl, gets distracted and misses his bus – route No.12B. As a result he misses the interview, and ends up getting employed as a Garage Mechanic with Madan, his friend. He does meet with the same girl, gets to know her name is Jyotika, who lives a wealthy lifestyle with her mother, Sulo, while her dad is away on business. Both continue meeting not aware that her marriage has been arranged with Pratap. This story also depicts the possibility of Shakthi catching the 12B on time, attending the interview and getting hired, pursuing Jyotika in vain, and ending up in the arms of his co-worker, Priya. Both possibilities end up with Shakthi getting involved in a vehicle accident – and no guarantees that he will survive or wed Jyotika.

36-year-old Vasanthi (Jyothika) is a UD clerk in the Revenue Department. Her husband Tamizhselvan (Rahman) works at All India Radio. Tamizhselvan aspires to emigrate to Ireland, but Vasanthi cannot accompany him as most Irish companies refuse her job applications because of her age being a problem. There is nothing interesting about her life; she leads a mundane life but she craves for a change.
One day, Vasanthi is summoned by the IG, Rajan (Nassar) to his office and she learns that the President of India would like to have a conversation with her. The meeting turns ends in disaster after she faints in front of the President and she becomes the subject of Facebook jokes and before long, she watches helplessly as her husband and daughter Mithila (Amritha Anil) fly away to Ireland.

Karthik falls in love with Archana, a girl who has a hearing and speech impairment. However, when he realises that she does not feel the same way about him, he is heartbroken.

A married man has an extramarital affair after his wife begins ignoring him due to their son’s illness. His life is turned upside down when a goon rapes his mistress and begins extorting him.

When a visiting researcher tries desperately to escape, after mistakenly captured by police for an alleged theft in a temple, bizarre things start happening.

Abhes Balayya (Suriya), the guide conman thief, is footloose and fancy-free. He and his acolyte Sathyaraj (Sathyan) have no hangups in life. He is also a huge fan of actor Ajith Kumar. Balayya’s problems start when he and Sathyaraj land up in a huge villa on the beachfront. It is actually actress Jothika’s (Jyothika) house. When they realize it, they want to replace what they have taken. As it happens, the actress catches them and creates a huge issue out of it. For their efforts, they are put behind bars. Jothika does not like Balayya at all. Balayya goes out to take revenge on her and kidnap her. Just about when the whole industry and her family tries to trace Jothika, she understands the real Balayya. In the end, Balayya comes to see her and gives her a gift, which is the photographs they took together.

Karthikeyan (Arjun) is a photographer-editor working in Indian Express. Chitra (Meena) is a bank employee. Both reside in Navi Mumbai. Karthik meets Chitra while opening a bank account. While returning home, he again meets her in a train. He offers his seat, but she does not want to accept it. During a train strike, he invites her to travel in an auto to reduce expenses, but she declines. When Chitra hesitated to travel in the same train with Karthik, he became angry and explained that he talked to her because both are from the same locality, both are Tamilians, and he promises her that he will never talk to her anymore. After some days Chitra voluntarily talks to him. Karthik, in return, accompanies her to a police station to get back her snatched handbag. Karthik invites Chitra to his home to meet his parents.
Karthik’s parents like Chitra and all become friends. Karthik’s mother requests Chitra to tell Karthik to get married. When she conveys his parent’s wish, Karthik explains about his wife Aruna (Jyothika), who died in a train accident. Karthik learns that Chitra’s husband Srikanth (Ramesh Aravind) died in the same train accident. Chitra adopted a boy, Shiva, as per her husband’s wish. Karthik’s parents want them to get married.
Shiva moves close to Karthik and his family, while Chitra tries to prevent relations with Karthik. Karthik’s father (Nagesh) understands Karthik’s interest towards Chitra. He asks her to marry Karthik. She refuses, and once for all, avoids Karthik. Karthik understood her intention and stayed away from her. Chitra meanwhile gets confused regarding second marriage due to the trouble given by her neighbour’s husband and Shiva’s passion for Karthik. Chitra’s neighbour once attempts to rape her; she manages to escape. Karthik, who heard about it, attacks the man for misbehaving, and makes him vacate Mumbai.
Chitra decides to marry Karthik for herself and her son. She plans to meet him at the station to express her decision. While returning home, she meets her mother-in-law (Lakshmi), who at one time opposed the marriage of her son Srikanth with her. Chitra’s mother-in-law requests her to come and live with her as she is very alone after her husband’s death. Chitra leaves with her mother-in-law. She has not dared to meet Karthik and she leaves without informing him. Karthik and his family are very much disappointed by this.
After some months, Chitra panics on seeing a news about a bomb blast at Mumbai Indian Express and verifies Karthik’s safety. Karthik leaves for Coonoor on an official assignment. There he meets Chitra with her mother-in-law. Chitra introduces him to her and tells about Aruna’s death in the same train accident where Srikanth died. On hearing this, Chitra’s mother-in-law invites Karthik to have lunch with them the next day. This delights Shiva. He eagerly waits for Karthik and leaves school well before, but is stuck in a traffic jam for a long time. Meanwhile, Chitra explains about her decision to marry him, and later changed it as her mother-in-law requested her to live with her. Karthik leaves without meeting Shiva to catch the train. This disappoints Shiva. When Chitra tried to console him, he blames her that she did not keep up the promise that he, Chitra, Karthik, and his parents to live together. Chitra’s mother-in-law hears this, understood the meaning of it and she realised the mistake she made. She catches Karthik at the station and requests him to marry Chitra. Karthik and Chitra leave for Mumbai and get married, which delights Shiva and Karthik’s parents.

Ashok (Madhavan) and Julie (Sree Devi) have been friends ever since childhood and they don’t share any love interest. Ashok falls in love with Nandini (Jyothika), a rich girl with whom he marries, and although Julie’s closeness to Ashok initially irritates Nandini, she subsequently accepts it. Julie falls in love with a guy called Michael (Vineeth), a cricketer who’s hoping for a place in the Indian criket team and Ashok happens to be his main opponent. When Ashok gets selected, Michael’s father strikes a deal with Ashok that the marriage between his son and Julie will only take place if Ashok steps down and let Michael substitute him, to which Ashok agrees for friendship’s sake. When Michael learns of this at the end, he restores the severed ties between himself and Ashok, and the movie ends upon a happy note.

Deva and Shiva (both played by Ajith Kumar) are twins. Deva, the elder, is deaf and mute; but he is a genius, an expert at lip-reading, and the head of a successful advertising company. Shiva loves and trusts his brother. Priya (Simran) wants to marry someone who is an ex-smoker, ex-drunkard, and who got ditched by a girl but is pining for her. Learning this, Shiva, with the help of his friend Vicky (Vivek), invents an old romance between him and Sona (Jyothika), and finds his way into Priya’s heart.
Meanwhile, Deva chances upon Priya and lusts for her. His obsession continues even after his brother gets married to the girl of his dreams, and he devises various means of getting close to Priya and keeping Shiva and her separated.

Saravana (Silambarasan) and Krishna (Krishna) are close buddies in college. Saravana sees a video tape of Krishna’s sister Sadhana (Jyothika) studying in London and falls in love with her. So to meet her, Saravana goes with Krishna to a village near Tirunelveli where he finds that there is a bloody war going on between two warring caste groups. Krishna’s brother Soundarapandi (Prakash Raj) his wife and Krishna are killed by the rival group of Dorai Singam. However Saravana saves Sadhana and takes her to Chennai. Initially Sadhana is not accepted by Saravana’s large family but slowly when they come to know about her background they support and love her. The rest of the film is how Saravana tries to help Sadhana to go back to London, and in the process eliminates the entire gang of Dorai Singam single-handedly.

Arumugham (Vikram) is an uneducated, good hearted, helpful village hick. Easwari (Jyothika) is his childhood friend. A chemical factory in the village pollutes the local river and when all attempts to stop the factory waste from going to the drinking water falls flat, the villagers decide to send Arumugham to Chennai and meet the concerned minister who has won from their constituency. He sets out for the city with Easwari and her grandmother and they stay with Arumugham’s friend (Vivek) and gang. Swapna (Reema Sen) is a model who stays in the same area and she lusts after Arumugham. They meet the Minister (Sayaji Shinde) who is extremely nice to them and promises to help them. Soon Arumugham is forced by circumstances to fight against an anti-social gang with a lady boss. An honest police officer (Manoj.K.Jayan) tries to collect evidence against the criminal gang. When Arumugham realizes that the bad guys are the henchmen of the same Minister who is behind all the crimes, !

Naachiyaar (Jyothika) is a tough policewoman in Chennai who is put in charge of solving an underage rape case. She tracks down a pregnant Arasi (Ivana), the victim, from her uncle and his goons who plan to get her an abortion. Although Naachiyaar saves Arasi, her uncle and his friends escape and go into hiding. Meanwhile, Naachiyaar’s partner, Feroz arrests the suspect, Kaathu (G.V. Prakash Kumar). He is then sent to a juvenile home, where he tells his story to one of the wardens, who is soft-hearted towards him.
Through flashbacks, we see how Kaathu and Arasi first met. Both are still teenagers from the slums but they do not go to school but are forced to work to help support their respective families. Arasi works as a maid at wealthy families’ homes while Kaathu does odd jobs for a living. One day, while her employers are away, Arasi invites Kaathu into the house where they (impulsively) make love. However, Arasi quickly regrets and pushes Kaathu away, who leaves upset.

Arul is a normal labour in factory. continuous problems with politicians, he works against politicians and elections.

Murthy (Prashanth) earns his living taking the blame for the mistakes of other people, and so the jail is his second home. Dhanushkodi (Raghuvaran) has sworn to kill ex-collector Ramanathan’s (Vijayakumar) son Santhosh (Praveen Gandhi), and so, Ramanathan has transferred Santhosh to Mauritius while telling the world he has run away. Wishing to save his son, he hires Murthy to act as him, hoping Dhanushkodi would kill him instead of his actual son. Murthy too accepts the gig since his lover Preeti (Jyotika) is Ramanathan’s niece. In the climax, Santhosh supports Dhanushkodi for killing his father, but Dhanushkodi kills Santhosh. The film ends with Murthy taking the blame for killing Santhosh and surrendering himself to police.