In a remote village, Sakthivel and Thangarasu are half brothers. Sakthivel is a man of high values and integrity who has a wife and a son while Thangarasu is an angry young man who cannot tolerate injustice, thus getting easily in trouble. The half brothers are both respected by the villagers, but Sakthivel refuses to even acknowledge Thangarasu as his brother. Meanwhile, Manju and Revathi fall in love with Thangarasu. During a wedding function, some rowdies misbehave with Sakthivel's wife, Manju, and Revathi. Thangarasu beats them up. At the village court, Sakthivel insults Thangarasu and publicly flogs him. A heartbroken Thangarasu then blames his mother believing that she had killed his father and his grandfather tells him the truth. In the past, Sathyamurthy was a village chief with a heart of gold who helped the poor. He lived with his shrewish wife Annapoorani and his son Sakthivel. Annapoorni's brothers then brainwashed her: Annapoorni didn't want her husband to help the poor any more and started to behave harshly towards him. Sathyamurthy slowly distanced himself from Annapoorni and secretly continued to help the poor. Soon, Annapoorni suspected Sathyamurthy of having an affair with the poor village woman Kannamma and Annapoorni even publicly humiliated her. Kannamma then attempted to commit suicide but Sathyamurthy saved her. Sathyamurthy's mother advised her son to marry the innocent Kannamma. Back to the present, Thangarasu finally meets his mother Kannamma who was living all these years in a special home and he brings her to his village. There, Sakthivel insults Kannamma for killing his father Sathyamurthy. Thangarasu and Sakthivel fight but their grandmother stops it and tells them the truth. That day, Sathyamurthy had eaten poisoned food given by Annapoorni and her brothers and the blame was put on the innocent Kannamma. Sakthivel eventually apologises to his half brother Thangarasu and his stepmother Kannamma. Annapurna scolds her brothers for killing her husband but they swear that they are innocent. Sakthivel and Thangarasu finally find out the culprit: Thambidurai, a rich
zamindar who hated Sathyamurthy for helping the poor. Sakthivel and Thangarasu beat Thambidurai and his henchmen up, and the police arrest Thambidurai for the murder of their father. == Cast ==