Oru Mukham Pala Mukham (1983)
Oru Mukham Pala Mukham is a 1983 Malayalam action film starring Ratheesh, Srividya, Mohanlal, and Mammootty. Ratheesh plays Raveendran Thampi, who takes vengeance against Subhadramma Thankachi (Srividya), for killing his family and adopting him. Mohanlal plays the real son of Subhadramma Thankachi, while Mammootty plays Raveendran Thampi's real father.
More at Wikipedia.