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.

Vijay (Arjun) is a hitman who works for Sundaramoorthy (Radha Ravi). He kills anybody for a price, other than women and children and he lives alone in an apartment. Pooja (Pooja), a young girl, studies in a boarding school and comes to her father’s house for the holiday. Between her abusive father, selfish stepmother and an arrogant step-aunt, Pooja feels rather badly but she treasures her lovely little brother Dinesh (Mahanadi Dinesh). Pooja tries to befriend Vijay but Vijay is not interested. Her father is a drug smuggler. One day, a corrupt police officer Jayanth (Raghuvaran) kills Pooja’s family including her brother. Vijay decides to accommodate Pooja and Pooja compels him to teach her his skills as a hitman. What transpires later forms the crux of the story.

Bala (Gemini Ganesan) and Bhanu (Jayanthi) are a happily married couple. Everything seems fine till Sheela (Vanisri) enters their lives. Bala is a tennis champion and Sheela claims to be his fan. The family members raise objection to this liaison but Bhanu trusts her husband blindly. Bala takes undue advantage of this trust and continues to meet Sheela on the sly till one day Bhanu stumbles upon the truth. This breach of trust breaks Bhanu which eventually leads to her death. An unrepentant Bala takes this as an opportunity and proposes to marry Sheela. His mother is shattered but gives in to his demands. An elated Bala rushes to Sheela only to find her missing! Was it poetic justice?

Thiruchitrambalam lives with his father and his grandfather. He blames his father for the loss of his mother and sister and is not on good terms with his father. Meanwhile, his love life is not so successful.

Nallasivam (Kamal Haasan) and Anbarasu (Madhavan) are drawn together by the strings of fate after they come into contact at the Bhuvaneshwar airport. Anbarasu is an advertisement director, while Nallasivam is a trade unionist. Fate entwines their travel plans, and they end up travelling to Chennai together. In the course of their journey, Anbarasu, born with a golden spoon, is touched by the realities of the sufferings of a normal human being when he witnesses the dead and the injured during a train accident, and he volunteers to donate his blood, which is of a very rare group, despite his fear of blood. The flashback of Nallasivam is recounted during one of their journeys. Nallasivam is a communist trade unionist, who fights for higher wages for his comrades. By chance, he falls in love with the daughter Bala (Kiran) of a rich industrialist, Bala’s father, Padaiyacchi (Nasser).

The film is a comic thriller with Mirchi Senthil playing a soft spoken village boy working in Chennai. Robo Shankar plays the role of his room mate while debutante Shruthy Bala is paired opposite him.

Shashi Godbole is a homemaker who makes and sells laddoos as a home-run business. Her husband Satish and daughter Sapna take her for granted, mock her poor English skills, and generally treat her with disrespect, making Shashi feel negative and insecure. However, her young son, Sagar loves her as she is, and her mother-in-law offers her words of sympathy.
Shashi’s older sister Manu, who lives in New York, invites Shashi’s family to her daughter Meera’s wedding to Kevin. It is decided that Shashi will go to New York alone five weeks before the wedding to help Manu organize. Her husband and children will join her as the wedding approaches. During her flight to New York, Shashi is given inspirational advice by a fellow passenger (Amitabh Bachchan in Hindi/Ajith Kumar in Tamil). While Shashi is in New York, she has a traumatic experience at a cafe due to her inability to communicate in English. She is comforted by a French chef Laurent who happened to be queuing up behind her at the cafe.
Using the money she made from selling laddoos, Shashi secretly enrolls in a conversational English class that offers to teach the language in four weeks, showing her resourcefulness at navigating an unfamiliar city alone. The class comprises David Fischer, the instructor; Eva, a Mexican nanny; Salman Khan, a Pakistani cab driver; Yu Son, a Chinese hairstylist; Ramamurthy, a Tamil software engineer; Udumbke, a closeted African-Caribbean man; and Laurent. Shashi quickly becomes a promising and committed student, earns everyone’s respect with her charming behavior and her cuisine, and gains self-confidence. Laurent becomes attracted to Shashi. When he tries to kiss her at the rooftop of a building, Shashi rejects him and runs off, but fails to explain that she is married.

Pasupathy (Shiva) is a carefree man who is unemployed. He lives with his younger sister Kavitha (Monisha) and house maid Senthamarai (Kovai Sarala) who is a part-time black market liquor seller. Kavitha is in love with Pasupathy’s close friend Mano (Soori) which Pasupathy is not aware of. Mano indirectly tries to convey that to him to which he does not understand. Pasupathy’s maternal uncle (Ilavarasu) is a lawyer and their caretaker since their parents died. Pasupathy loses his house to a bank on a surety crisis which involved his father. Hence he is compelled to settle in a job. Pasupathy’s uncle applies for an opening in his friend’s mineral water company “Classique” for marketing head post. He gives many instructions about the owner Sivagurunathan(Prakash Raj) who is an ardent devotee of Murugan and who is against recommendations. Pasupathy manages to get the job by dressing in a simple Gandhian manner, posing as a Murugan devotee and tells he follows very valuable principles written in the book of Sivagurunathan himself which attracts Sivagurunathan.
Pasupathy one day lies to his boss that his mother got injured and leaves to watch an IPL match. There he enjoys a lot with his friends by drinking, screaming, cheering, etc. which is seen by Sivagurunathan as he was present on his friend’s invite for a business purpose. Sivagurunathan is furious on Pasupathy’s behaviour and he captures his activities on mobile. The next day he issues termination order to Pasupathy. To secure his job, Pasupathy lies that Sivagurunathan has actually seen his identical twin brother Ganguly Kandhan, a karate master who has blue eyes unlike his. Sivagurunathan believes him half-heartedly and yet gives him his job again.
Sivagurunathan has a daughter Janani (Isha Talwar) who learns everything half baked. Her interest turns to learning self-defense skills and tells her father to appoint a master to teach Karate. Sivagurunathan calls Pasupathy to send his brother for Karate coaching. Pasupathy wears blue contact lens and visits his home and manages to make Sivagurunathan believe he is Ganguly. Pasupathy and Janani had already met when Pasupathy rushed to save Janani from fire, but Janani ended up saving him. Pasupathy is attracted to Janani and he impresses both Janani and her maternal grandmother (Sachu). Sivagurunathan meets a bank officer (Devadarshini) who actually took Pasupathy’s house. She tells him that Pasupathy is actually a fraud and she has not met anyone like Ganguly which confuses Sivagurunathan. He appoints a CID officer to follow Pasupathy and find out if he has a brother Ganguly. Pasupathy manages to cheat the officer and make him believe that there are two brothers. But he innocently behaves and submits his and Ganguly’s resignation letter to him telling that his mother did not want them to work for a boss who doubts their loyalty. Sivagurunathan says that he would apologise for his doubtful behavior to his mother which creates further trouble for Pasupathy. He rushes home and disguises Senthamarai to act as his mother. Sivagurunathan believes that setup and apologises to Pasupathy’s “mother”.
Janani falls for Ganguly and she wants him to find if he loves her and she keeps him a test. She wants him to wish for her birthday on the following Tuesday and she will not tell him that she is going to Dubai. Pasupathy tries to get information from Janani’s grandmother. He goes to Sivagurunthan and tells Ganguly has gone to Dubai which angers Sivagurunathan as he doubts that Ganguly has gone to impress his daughter. Pasupathy pretends to say that he will go to Dubai and stop his brother and bring back his daughter to which Sivagurunathan accepts. Sivagurunathan plans to marry off his daughter to Pasupathy against Janani’s wishes. Pasupathy goes to Dubai and both propose their love. Mano blackmails Pasupathy into letting him marry Kavitha otherwise he would reveal his double act to Sivagurunathan. Pasupathy, with no other option, arranges for their marriage. Janani leaves her home as she does not want to marry Pasupathy but Ganguly. But upon realising Pasupathy’s fraud she angrily beats him. He convinces her by saying all he did is for her sake which cools her. Sivagurunathan misunderstands that Janani is going to marry Ganguly and rushes to stop it but finds that Ganguly is Pasupathy himself. He furiously chases him and Pasupathy runs. In the temple, he bumps into a man (Santhanam) who is being forced to marry a girl against his wishes. They concoct a plan to foll Sivagurunathan. After several chases and runs Pasupathy manages to get the chance to marry Janani, but declines as he does not want to marry Janani against his boss’ wishes. Sivagurunathan changes his mind and lets them marry.

The story is about a group of friends who wish to go to college together regularly. The group consists of Naresh, Sai Ram Shankar, Abhishek, Swathi and Sherin. Once, one of their friends named Lakshmi gets engaged. So the team decides to have a nice party before she gets married.

Arjun (JAYAM Ravi), an unemployed youngster and Deva (Rahul Dev) a powerful don both fall in love with Sailaja (Shriya), a middle-class beauty, at the same time on a rainy day at a railway station. Arjun keeps bumping into Sailaja coincidentally every time it rains. This makes them both feel that it is perhaps the rain that keeps bringing them together, and they start to fall in love. Deva, on the other hand, takes the back-door route to get the girl, with the help of her good-for-nothing father (Kalabhavan Mani). After learning of the Arjun and Sailaja’s love, Deva and Sailaja’s father work up devious plans to break them up. And finally they succeed in creating a rift between the two lovers. Though Arjun realizes what is really happening, Sailaja falls prey to the foils of the Deva and her father. The young lovers part ways; Sailaja becomes a leading lady in the movies and Arjun works with his uncle in a quarry as a demolition expert. Deva is cheated out of some money by Sailaja’s father, and as revenge, he finds out where Sailaja now lives and kidnaps her from right under her parents’ noses. Sailaja’s father realizes that the only person who is daring enough and cares enough to get his daughter back is Arjun and goes to him with his pleas. It takes much convincing, but Arjun finally decides to rescue Sailaja but for reasons other than love. How successful is Arjun in rescuing Sailaja? Will Sailaja realize that Arjun was true in his love? Will they fall in love again?

Kumar (Siddharth) is a software engineer who lives in a joint family. All of the marriages in his family have been love marriages for generations. He, however, swears off girls and love because of bad experiences in his childhood and teenage. One day, Sanjana (Hansika Motwani) joins his office and he falls in love with her. Unable to convey his feelings, he seeks the help of Nokia (Santhanam), a man who earns a living by helping men impress their lovers. Nokia teaches him to be more assertive and flirtatious. He makes Kumar spread the rumour that Sanjana is seeing her boss, George (Ganesh Venkatraman). As a result, Sanjana stops spending time with George. George then asks her to be his girlfriend, coincidentally when Kumar was planning to confess his love for Sanjana. She accepts, leaving Kumar heartbroken. Nokia then intervenes and breaks up George and Sanjana. Sanjana and Kumar finally get together but Nokia tries to break them apart after he finds out it’s his sister he has been helping Kumar with. Then, Kumar admits to Sanjana that he manipulated her feelings but then seeks her forgiveness. Then they get back together, with the acceptance of Nokia who sees Kumar’s true love for Sanjana.

The movie starts with Raghu (Jai) trying to kill his father for not taking good care of his family. That is when he comes to know that he owns an ancestral property in Kasi which was given as lease almost 100 years ago. At the same time, an IT raid takes place in a minister’s house. The minister hands the laptop having his property detail to his auditor, who demands 5 crores to hand over the laptop. In Kasi, Raghu’s ancestral property is taken care by Seenu (Jiiva), but he is unsuccessful. It is then showed that Seenu and Raghu had been cheated by Ganesh (Shiva). They move to Karaikudi to get hold of Ganesh and get back their money. Meanwhile, the minister starts his journey to get back the laptop. How Raghu and Seenu get back their money and how the minister gets back the laptop forms the rest of the story.