The film stars Sivaji Ganesan and B. Saroja Devi, with K. Balaji and Nagesh in supporting roles.

While Kannan is a good and kind hearted person taking care of all the family businesses, Viswam is a spoiled brat who just roams around spending unnecessarily.

Boopathy keeps worrying about Viswam due to his irresponsible behaviour and requests Kannan to shape him into a good human.

Sabapathy is shocked and devises a plan to make him act as Kannan, so that the family members could feel relieved.

Viswam tells his family members that the new person should be someone else acting in place of Kannan to steal money.

He tells a flashback, where Kannan was rescued by a group of stage actors who were travelling in another boat.

To prove his identity, Kannan discloses about the secret told by his father Boopathy before death.

Boopathy told Kannan about the location of jewels that belonged to his mother which was secretly hidden in a place.

Viswam is transformed in to a good human and Kannan feels happy that he has fulfilled his promise to his father.