Nagalingam, the municipal chairman, is crooked and cruel, committing many atrocities in the town and engaging in anti-social and illegal activities.

Nagalingam sends his men to kill Velan, but Sundharam rescues him and disguises him as a college student.

He leads a happy family life with his ideal wife, Annapurna, and their daughter, Radha.

Sattanathan arranges a marriage for Radha with his childhood friend Sripathi's son, Raghu, who resembles Velan.

Sattanathan reveals to Raghu that Nagalingam is responsible for his father's death, which was falsely portrayed as a suicide.

Velan uncovers the secret evidence, finds the route to Nagalingam’s hideout, and defeats him, saving Raghu.

The movie concludes with the happy marriages of Velan and Radha, Raghu and Kamala, and Sundharam and Kaveri.