JK, a CID officer, is forced to take up a case while on a lookout for his own sister who is missing. While investigating, he realises there is more to the case and goes on to unveil the mystery.

On 16 September, superstar Gautham Krishna (Prakash Raj) gets ready for the release of his new film. On the same day, Traffic Constable Satyamoorthy (Cheran) returns to duty after his suspension for taking bribes. The day is special for Dr. Robin (Prasanna), who is celebrating his first wedding anniversary. Karthik Vishwanathan (Sachin), an aspiring TV journalist, starts his first job with an interview with Gautham. On the same day, at a crowded traffic junction, Karthik, who was set to interview Gautham, and Ajmal (Mitun), traveling on a bike is hit by a speeding car and is rushed to Global Hospital. Also at the junction, in another car, was Robin. Karthik goes into a coma and is declared brain dead, although he is kept alive on a ventilator.
Meanwhile, Gautham’s ailing daughter Ria’s (Gabriella Charlton) heart condition worsens and urgently needs a heart transplant. At first, Karthik’s parents do not agree to donate their son’s heart, but Ajmal and Karthik’s girlfriend Aditi (Parvathy) persuade them. Now that the heart is available, the problem is how to transport it to Vellore. No chartered flights or helicopters were available and so the heart must be taken by road. Someone had to drive 150 kilometers in under 2 hours during rush hour. City Police Commissioner Sundara Pandian (R. Sarathkumar) is asked to carry out the mission. He initially refuses, considering the complexity and risk involved, but finally succumbs to the persuasion of Dr. Arumainayagam (Vijayakumar). Accompanying him on the mission are Robin and Ajmal. At some point, they lose connection and the vehicle mysteriously disappears. Under pressure and stress, Satyamoorthy trusts his own instincts and takes his own route. Sundara Pandian loses patience and loses hope that he’ll be able to transport the heart in time, resulting in cancelling the mission. Just in time, Satyamoorthy manages to get connection, which motivates everyone to deliver the heart safely in time. As the mission proceeds, it is discovered that before Dr. Robin committed to accompany Satyamoorthy on this mission, he had attempted to kill his wife, due to her affair with his best friend. To escape from the police, Robin tries to sabotage the mission, but Gautham’s wife (Raadhika) convinces him to save her daughter’s life. They reach the hospital in time to save the girl’s life just as Karthik’s father (Jayaprakash) and mother (Lakshmy Ramakrishnan) prepare to cremate their son.

In 1970, a marine engineer Lenin (Cheran) from Calcutta comes across a Nagore girl Nadira (Padmapriya). Started with friendship, later seeded with love, Lenin mails a letter once a month. When Lenin came to Nagore, he was disappointed and sad as Nadira and her family left the place after selling their home. Years later, Mahesh (Aryan Rajesh), son of Lenin, found his father’s hidden life from reading his diary. With help from his friend Shamsudeen (Ajai.R), He marches his way to find Nadira and deliver the letter to her. He comes to know that Nadira has shifted to Malaysia after marriage. He goes to Malaysia to meet her. Once he reaches her house, he is greeted by Nadira’s son who welcomes him to the house. Nadira is now very old and asks Mahesh as to who he is and how does he know her? He replies saying he is Lenin’s son and also informs her that his father died few years back. Nadira is grief-stricken. Mahesh gives her Lenin’s last few letters which he could not post because he did not have Nadira’s address. In those letters, Lenin has spoken about his journey to find Nadira after she and her family shifted from Nagore. He describes his pain and grief over not knowing about her situation during those days, and also about his father who coaxed him to marry another girl (played by Anupama Kumar), who is now his wife and is very understanding. Nadira then drops Mahesh to the airport and while on the way she request him to let her talk to his mother. Nadira and Mahesh’s mother exchange good notes and then she finally drops him to the airport. While coming back, she is talking to her herself as well as to Lenin saying that she showed her anguish and punished her father by denying to marry anyone. She currently lives with her sister and her lovable family and apologises and promises Lenin that she will join him soon and never separate.

A CB-CID Officer, who suffers from Kleine Levin syndrome, returns home to find his teenage daughter has gone missing.

Kumar (Cheran) is a young man who comes from Thiruvannamalai to Chennai with dreams and hopes about the future. He gets a job in a men’s beauty parlor in Chennai. Every day, he observes and learns more about life in the city. He starts to dream and build castles in the air.
Maheswari (Navya Nair) works in another beauty parlor and also has desires of her own.
The rest of the story is about what happens to these two people. This three hour-long film has similar themes compared to Cheran’s previous films. The key message in this movie is that each person’s life is in his or her own hands.

After finishing a successful meeting with his movie producers in Bangalore, Nanda, a jingles composer catches the highway to Chennai. On his way his car breaks down and he hitchhikes with Arjun, a businessman’s son on his way to the same destination. During their journey together they discuss their personal lives till Arjun proposes a deal; a deal that is marked with murder but promises to better their personal lives. However this deal does not work in Nanda’s favor and he soon finds himself in deeper complications.

Gunasekaran is an ardent social worker, also a student of London school of Economics and Mallika is a physiotherapist, and the pair meet up by the sea. Guna tried his hand to impress Mallika, does he win her heart? The third pair is Varun and Anjana and starts in the year 2016 and then flashes back to 2012.

The romantic story begins with Senthil (Cheran) setting off on a journey, to invite his friends and family for his forthcoming wedding. Along the way, he encounters various individuals from his past, who bring back memories of three women that have influenced his love life.
The movie begins with Senthil, who runs an advertising agency, boarding a train to visit his native village to invite all his friends for his wedding. During the journey he reminisces his teenage days. The happenings in the school, his tussle with his friends and his first love with his classmate, Kamala (Mallika), are all pictured with fun and drama. However he father married her off early before her 11th grade. He meets Kamala after 15 years and she is now a pregnant mother of 3 born children. Senthil reaches the village and invites all including Kamala, who promises to come to the wedding.

Very much concerned about his family’s financial status, Arivudainambi is unhappy with the way his sister’s wedding to a wealthy man is being done.

Natesan, an engineer, gets married to Visalatchi who likes his joint family. After he moves to a hill station for his work, his wife becomes a victim of loneliness and ends up taking sleeping pills.

Story evolves around two sets of half brother’s. Periya aambala married twice and he got lots of children from both wife’s. Saravanan and his siblings from the first wife, Cheran and siblings from the second. Saravanan decides to build a house with Cherans support so both families can live together. The villain in the village who have rift with the brothers decides to…