Kamal Haasan (Gopi and Vinoth)Radha (Padhmini)Goundamani (Servant)Janakaraj (Doctor)V.K. RamasamyVinuchakravarthy (Manager)
Gopi is an unemployed graduate from a middle class society and Vinod is a rich graduate from high society returning from abroad after his father's death. In order to claim the property of Vinod, the estate manager with his mob guys assaults him and make him a drug addict by repeated injections administered by a fake doctor. Gopi's lover Padmini's father, a family friend of Vinod's father, together with Padmini, come to the estate on an excursion. Due to her curiosity, she sees Vinod and finds out that he is in a dangerous state of health due to the drug addiction. Padmini later learns that Gopi and Vinod are twins separated at birth. With the help of the house's servant, Padmini replaces Vinod with Gopi and sends him to his mother's house to save him. Gopi takes it upon himself to save the estate and properties from the hands of Vinuchakravarthy and his accomplice.