Raja is paranoid about getting married. Priya Mahalakshmi arrives at his place acting as his friend Madhi’s lover. However the truth comes to light and on confrontation, she reveals that her father plans to marry her off so she ran away from home and needs a place to stay. Raja obliges and she meets Raja’s parents, introducing herself as Raja’s lover. Raja’s parents become very happy and plan their marriage, without Raja knowing. On the day of the engagement, Raja gets infuriated and asks Priya to move out, throwing her bag. A photo gets dislodged and when Raja sees it, he gets shocked; it is Priya, who he loved.

In a flashback, it is seen that back in college, Raja was a writer and Priya was his die-hard fan. However, try as she might, she can never seem to meet him. One night when Raja performs a song on stage, she goes up to him to reveal her feelings. Under the cover of darkness Priya confesses her love for Raja. When the lights come back on, the other Priya, known as Thayir Saatham, is next to Raja and he believes that it was her who revealed his love. Priya finds out that Raja is staying as a tenant above Thayir Saatham’s house and uses her to get information about Raja. In this way, Thayir Saatham and Raja become close. In a parallel track, Bhavani, is Priya’s college mate who is a rowdy and lusts after Priya. Raja and Bhavani clash when Raja beats up Bhavani when he refused to compromise on the love between two people from different colleges. Bhavani loses face and swears revenge. Priya eventually reveals her feelings for Raja to Thayir Saatham, who feels bad and decides to avoid Raja until she can tell the truth to him. Raja, thinking that she is angry at him for not signing up for a computer class suggested by her father, goes early one morning to sign up for it. Thayir Saatham goes after him but is caught by Bhavani in a car. Bhavani attempts to rape her but she manages to lower the window and manages to see Raja, who chases after the car. Bhavani throws Thayir Saatham out of the car, killing her. Devastated, Raja keeps avoiding the topic of marriage, unable to forget her.

The truth revealed to everyone, Raja’s father requests him to forget the past and marry Priya, but Raja refuses and Priya waits for the train to leave back to her house. The train arrives and both her father and Bhavani are on it. When Raja sees Bhavani, he gets enraged and after fighting Bhavani’s goons, boards the train and bashes Bhavani, eventually killing him. Priya and Raja finally unite and the movie ends.