Savithri is a doctor who treats the poor for free. When she discovers that Vanaja, a young wealthy woman in their community, is being harassed by Nagalingam, a crooked lawyer. She and her husband Somasundaram endeavour to help Vanaja. Later, Nagalingam is murdered by an unknown assailant and Somasundaram is wrongfully convicted of the crime. Savithri investigates the murder and identifies the true killer as Jagath Singh, a doctor who had been blackmailed by Nagalingam.