Theenalangal (1980)

Madhavan murdered Damodaran Master and raped his daughter Devamma, and to escape certain death sentence murdered his identical twin brother Rajasekharan and assumed his identity. Years later, Ramu and Babu, the two younger brothers of Devamma, arrive on the scene - and Madhavan is recognised by Basheer, Damodaran Master's friend and Babu's foster father. Madhavan has to commit many more murders to keep his identity secret from the vengeful brothers.