Ezhavathu Manithan(1982)

Anand, a skilled engineering graduate, comes to a village from Madras to work in a cement factory. He is shocked when he learns about the exploitation and mistreatment of the workers there. Arjun, the corrupt manager of the factory, takes half of the wages from every worker as his commission. Anand complains to Ramkumar, the son of the factory owner, who used to be a college friend, and Ramkumar gives Arjun a warning. Meanwhile, Anand befriends Senthamari, a labourer in the factory, and is attracted to Gowri, Senthamari's sister