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The movie revolves around Thomman, who is a thief, and his two sons, Shiva and Sathyan. The story begins when they decide to mend their ways and lead a hardworking life. They own a lorry now and want to find work. Their lorry breaks down near Udumalpet. There the twists start. Sathyan steals some food from Panicker's house. The food is mixed with poison by Panicker due to oppression from the village head Thevar because Panicker's son cheats him and his daughter. Thomman eats the food and is hospitalised. After returning from the hospital, Thomman and his sons approach Panicker to know the truth. Thomman and his sons decides to help Panicker and they defeat Thevar's gang and take Thevar's henchman Rajakkannu as their slave. Later Thevar's daughter Poonkavanam falls in love with Shivan. Thevar arranges Shivan's marriage with his daughter. Kaliyappan who is Poonkavanam's maternal uncle successfully stops the wedding. At the wedding night Sathyan becomes a thief who robs the groom's ornaments, which makes the brothers to part ways. However, Kaliyappan was the real culprit. He tries to kill Sathyan and tell everyone that he escaped with the money. Panicker's son is killed by Kaliyappan. Shivan comes and helps Sathyan. They go to Thevar's house and reveal to him the truth about Panicker's son and all the misdeeds of Kaliyappan. After all goes well, it was revealed by Rajakkannu that Thomman, due to his son's separation, attempts to commit suicide from a cliff. His sons rushes to the cliffside and Thomman tell that they would fight and defeat him in order to reconsider his decision. at the climax, Shivan and Sathyan beats Thomman and the trio reunite.
