When his father is murdered by an unknown gang, Natesan sets out to find the killers. But, he is shocked to learn that his father’s death has a connection with the murder of his childhood friend.

The film begins with Arivazhagan (Shirish Saravanan) along with his friend locking up an unknown man and torturing him with a camera filming the whole incident. The movie then turns to a flash back, where Arivu narrates how happy he and his family was. Arivu who is a writer for a press and the eldest son of a retired Police Head-constable and his wife, has a brother named Madhi who is a 1st year Engineering student. Arivu’s Middle-class family life is however happy with his friend Kumar (Sendrayan) mingling as one of the family. Problem begins when Madhi who is pressured by his Girl friend to get an expensive bike, persuades his family to get him a bike. Though hesitant at first, they agree to get him a bike of his choice. However, delay in getting his bike and seeing his classmate Ganesh (Nishanth) spending casually makes him curious to know what he does for money. This is when he is introduced to the heinous crime of chain snatching. Ganesh introduces him to Guna (Bobby Simha) who is heading a gang of young college going chain snatches. Madhi joins the gang and starts to earn through chain snatching, and gets all the things he wants. [3]

Selvam is targeted by a local criminal who thinks his son was killed by the former. Later, the criminal pays a cop to kill Selvam in a fake encounter.

The movie begins with Jeeva (Sathya) being taken to court, where he recalls his past. In 1989, at the beginning of his 12th standard, his friend Balaji (Ananth Nag) falls in love with their classmate Karthika (Miya). Jeeva talks to Karthika but comes to know that she is actually in love with him. The next day, he accepts her love. Jeeva’s father died when he was young, and his mother (Rindhuravi) married again. Once when Jeeva and Karthika are out, they are caught by police, and both their families are informed. Later, when Jeeva goes to apologize to Karthika’s parents, he is hit by her father (Vaidyanathan). Meanwhile, Karthika’s father applies for a transfer. Jeeva and Karthika promise that they will not meet until their last exam. On the last day, Karthika leaves but gives a letter to Balaji and tells him to give it to Jeeva, but Balaji does not give it and tries to convince Jeeva that Karthika does not love him anymore. Jeeva and Karthika try to meet each other but in vain. Finally, Jeeva learns Karthika’s whereabouts, and they finally meet. When he meets her, he lands up in a fight with her friend. He goes to her home and asks her if she still loves him. She says no but later feels she should talk to him and marry him the way he asked her as proof, but fate has other plans. The next day when she meets him, he stabs her before she can say anything and later realizes she is still in love with him. He tries to save her, but she dies in his arms. The scene returns to the present, where Jeeva escapes from the police to find Karthika’s grave, then he jumps off a cliff. The movie ends with Jeeva and Karthika united in heaven and their names written on the bark of the tree by Jeeva when they first met.