Raja (Su. Thirunavukkarasar) is an honest police inspector who is transferred to a new department. In his new area, the politician Inbasekharan (Nizhalgal Ravi) controls everything and cannot hesitate to kill those who face him. First, Inbasekhar tries to bribe Raja but he refuses. In the meantime, Sundar (Ramkumar) falls in love with the minister's daughter Shanthi (Anju). Later, Shanthi takes revenge on the poor man Sundar because he won the college first prize. Sundar is expelled from the college and he becomes an auto-driver. Shanthi develops a soft spot for Sundar while Inbasekharan wants to marry her. Thereafter, Inbasekharan's brother kills Raja's sister. Thus, Raja challenges Inbasekharan to punish him. What transpires later forms the crux of the story.
