Vijay lives in Ranipet with his grandmother Maruthayi, whom he adores deeply. He is in love with his neighbour Anitha, the daughter of a police officer Raghavan, even though both pretend to hate each other in front of their families. Vijay and Anitha constantly make excuses to go to their common terrace to make love and bath together. But when Raghavan finds out about their relationship, he is furious. He requests for a transfer to Madras to keep Anitha away from Vijay. Before leaving, he catches Anitha holding love letters written to her by Vijay, and angrily throws them in Vijay's face. Vijay notices that all these letters contain Anitha's new address in Madras- Anitha had deliberately mentioned them in the love letters- and immediately leaves for Madras.

In Madras, Vijay stops at a restaurant to eat. When he asks a waiter about the restroom, he is warned not to use the upstairs restroom. Nevertheless, he goes to the upstairs restroom, where he notices a porn film shoot happening illegally. He is caught by the restaurant manager as well as the restaurant owner Singaara Naidu's son, who are both involved in the illegal shoot. In the fight that ensues, Naidu's son accidentally trips on a broken bottle and dies, and the blame is laid on Vijay, who is forced to go on the run. Raghavan is assigned the case to nab Vijay and is determined to bring him to justice. He offers a reward to anyone who can capture Vijay.

While on the run, Vijay is caught by constables Ekambaram and Karpooram, but manages to escape from them. In the process, however, Ekambaram accidentally kills the restaurant manager, who is also pursuing Vijay to kill him and prevent him from exposing the truths about what is happening in the restaurant. The manager's death is also blamed on Vijay. Eventually, Vijay is rescued by Rani, a female autorickshaw driver who used to work as a servant maid in his house and has a crush on him, and takes him to her house, where he reunites with Maruthayi, who is convinced that he is innocent. At this juncture, Raghavan arrives and arrests Vijay, but at the police station, he realises that Vijay is innocent, and decides to help him expose Naidu.

Meanwhile, Anitha is kidnapped by Naidu's men. Vijay escapes from police custody, rescues Anitha and confronts Naidu. But just as he is about to kill Naidu, Raghavan arrives and kills Naidu. He apologises to Vijay for whatever had happened and accepts his relationship with Anitha.