Gopalakrishnan is an honest and naive police constable who lives with his only sister Sugandhi. Sugandhi and her classmate Suresh (Ramarjun) quarrel for small matters. Meanwhile, Gopalakrishnan and Kalyani squabble whenever they meet. One day, Kalyani's mother dies and Gopalakrishnan brings her at his home. Later, Suresh and Sugandhi fall in love with each other and they get married secretly. Suresh's mother is later killed and the innocent Gopalakrishnan is arrested. Suresh discovers that the murder was planned by the corrupt politician Kodandam. What transpires later forms the crux of the story.