A theft gang terrorized the Tamil Nadu. The police officer Mahesh is charged to dismantle the gang. Mahesh lives along with his widow, blind sister Vidya, and his niece Anu. The reporter Vimala compels Mahesh for an interview, however he refuses. She later finds herself swooning over his investigative mind. They later fall in love with one another. Guruji, the native gang-buster, then turns into discomposed with Mahesh for falling in love with Vimala, his ex-fiance. Previously, Mahesh was a happy-go-lucky and immature youth. Moreover, Mahesh hated the police whereas his brother-in-law, a police officer, was in cost to catch the theft gang. His brother-in-law was later killed in a bomb blast, and his sister turned blind. To take revenge, Mahesh turned a police officer. The remainder of the story is about how Mahesh catches the theft gang and its chief Guruji.
