Ezhavathu Manithan

Ezhavathu Manithan lit. The Seventh Man is a 1982 Indian Tamil film cowritten and directed by K. Hariharan. Inspired by a reallife incident, the film focuses on environmental pollution and exploitation of industrial workers. Starring Raghuvaran in his first lead role, it features a host of newcomers playing other prominent roles. The films soundtrack was made up from an album composed by L. Vaidyanathan with the lyrics of Tamil poet Subramania Bharati.

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, Senthamaris sister.Gowri has not told anyone that she is affected by a lung disease caused by air pollution. Sudhakar, another labourer in the factory, is affected by the same disease. Dr Prema, a government doctor, informs Sudhakar that the disease has advanced and he needs to be treated in Chennai. Kulashekara Perumal, the factory owner, refuses to provide treatment to Sudhakar, resulting in the latters death. A distressed Anand pleads with the management to look into the issue and to provide the employees with benefits that they are entitled to receive, but he is refused. ........

Source: Wikipedia