The movie story deals with Tarzan who arrives at the Chennai International Airport after running an errand for Arumuga Dass of smuggling pre-release pirated movies on DVD. The two leave for their hideout and instruct Dilli, a hearing-impaired assistant of Dass, to make copies of the DVD. Just when police crews arrive into their vicinity, Dass informs Tarzan and the rest to leave. Tarzan tells the others to leave while he quickly sets up the burning process. Tarzan also leaves the hideout just in time. However, the police officers arrive at the hideout, only to see the burning process of the DVDs complete. The police then seize the DVDs and computers. The inspector, who was a friend of Dass, tells him that he can close the case if one of Dass's men agrees to the crime. Tarzan attempts to go, but another man, Chitti, who had no affiliation to them volunteers, takes the blame. Later, Chitti joins Dass's group. Dass is a diamond trafficker who smuggles diamonds from Africa. Tarzan's mother Kaveri does not appreciate his affairs with Dass, as she wants Tarzan, who holds a Master of Science degree, to have a government job. He occasionally visits home and her roadside grocery shop, only to get scoldings from his loving mother. When Tarzan is invited to Chitti's house, he gets impatient and knocks on the door. As the door opens, Tarzan slips and falls on the bed, expecting to see Chitti but scaring his younger sister Yamuna instead. Just before he drives off, he curses himself for making such a stupid mistake. Yamuna catches this and accepts his apologies, slowly starting to fall in love with him. Meanwhile, Kamalesh, the arch-enemy and competitor in smuggling of Dass slowly starts to try to foil Dass and his employees. A prank phone call from Chitti leads to a near-death experience for Tarzan and Kaveri. Escaping alive and outraged, Tarzan goes and confronts Chitti, releasing his anger to the full extent. Chitti then reveals that he was Kamalesh's personal spy and that even though that their bosses were foes, he was happy to be a friend of Tarzan. Disgusted, he leaves and Chitti too, and at that moment, Yamuna arrives, hearing everything. Thus, this stir of events causes the interval of the movie.