Mawaali (1983)

Ramesh gets employ as an engineer in a factory own and maintain by the wealthy, Goyal Verma. Goyal has a daughter, Nisha who is of marriage-able age and who also is in love with Ramesh. But their marriage is unacceptable by Goyal and in retaliation he fires Ramesh from his job. This does not end here as the next day Goyal is found dead in his bedroom and Ramesh is accuse of killing him; who is also convicted in a court of law and remanded to prison. While in prison he gets to meet his look-alike Gangu - with Gangu entering into the frame-work this opens up a game between Ramesh and the real killers of Mr. Goyal.