Balu visits his friend Karthik’s home in Chidambaram after completion of engineering. Balu meets Hema , sister of Karthik and both develops an affection which transforms into love. Kasi is the local gangster in Chidambaram and the entire town fears for him. 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. 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 none other than Kasi. To everyone’s surprise, Balu smashes Kasi in front of everyone and then leaves.Kasi is furious and wants to take revenge on Balu. Kasi’s men trap Karthik’s father and gets to know about Balu’s native place. Kasi sets goons to kill Balu. But Kasi gets shocked when he knows that Balu’s father is Durai , who is a powerful man in Madurai and it will be very difficult to attack them. Kasi leaves to Madurai and wait for the right moment to kill Balu and his family.Meanwhile Balu meets Hema and her family at a temple. Hema’s father initially gets angry seeing Balu as he was responsible to bring trouble by hitting Kasi but later Balu convinces him. Both the families decide to get Balu and Hema married to each other.One day, Kasi tries to kill Balu but instead attacks Durai. Durai understands that Balu is being targeted and decides to protect him. Thaiavasal Vijay is a local guy in Madurai who hates Durai and his family. He decides to help Kasi so that Durai can get killed. Kasi decides to bring in violence during a temple festival day and utilise that opportunity to kill Balu and Durai. But Balu saves his father and also fights Kasi. In the end, Balu hits Kasi badly and leaves the place challenging him to return if he still has guts to take revenge.