Balu (Vishal) visits his friend Karthik's (Raja) home in Chidambaram after completion of engineering. He meets Hema (Meera Jasmine), Karthik's sister, and they develop an affection which transforms into love. Kasi (Lal) is the local gangster in Chidambaram who is feared by the entire town. Balu, on his way back to his place, sees Kasi chasing a man with a sickle. When Kasi was about to kill the man he was chasing, Balu interferes and stops Kasi. An angered Kasi immediately tries to attack Balu, and to save himself, Balu retaliates by hitting Kasi. Only then, Balu comes to know that the person he hit is Kasi. To everyone's surprise, Balu smashes Kasi in front of everyone and leaves.