Mamu (Sarath Kumar) and Machi (Anandaraj), two orphans and heartless criminals, are sentenced to the death penalty. Raja (Udhayan), their cellmate, is an innocent youth who is in love with Kaveri (Dharini). Mamu and Machi decide to save Raja and they go to his village before their death sentence.

Mirasu (Senthilnathan) killed his elder brother Selvanayagam (Nizhalgal Ravi) and Selvanayagam’s wife (C. R. Saraswathi), he tried to kill his mistress Lakshmi (Kavitha) for the inheritance. The innocent Lakshmi was then sent in jail for Selvanayagam’s murder and gave birth in jail, with the help of a police officer, she escaped from jail with her son Vijay.
Many years later, Mirasu spreads terror among the villagers and rapes the village girls, his son follows his path. Poongodu (Sukanya) and her family try to flee the village but Mirasu’s henchmen intervene and Vijay (Sarath Kumar) saves them. Vijay, who comes from another village, introduces himself as an orphan. Poongodu falls in love with Vijay and he gets married to her. Finally, Vijay clashes with Mirasu. What transpires later forms the crux of the story.

Like a gardener with all his tenderness for his flowers, an old vigilante takes under his wing a young couple of runaway lovers. He lavishes on them love and safety. The father of the young woman who tries to eliminate the lover, is none other than the sworn enemy of the upholder of the law. It is because of him, that the woman of the hero lost their unique heir and cannot give birth any more from now on… Horrible memories surface and put the old upholder of the law on a war footing, for his ultimate confrontation…