Mohan (Sunil Dutt) is the only bachelor son of his widowed mother and works as a professor. He is against prostitution and considers prostitutes a black spot on society. But due to some circumstances, a prostitute named Champabai (Vaijyantimala) comes to his life in the form of Rajni. Will Mohan and his ailing mother accept Champabai as Rajni or not?

Mohan lives a middle-class life with his ailing mother and works as a college professor. His mother would like him to get married, but he asks her to be patient as he awaits his probationary period to end at the college, where he lectures his students about Vasantsena, the evils of prostitution, and his personal hatred of courtesans, who sell their lives for money. Things take a turn for the worse, when his mother suddenly collapses, loses consciousness, and is not expected to live long. The only way he can bring peace to his dying mother is to get married. His neighbor, Jeevan Ram, agrees to find a woman who will pose as a wife for a fee, and introduces him to a woman named Rajni, who is then introduced to his mother. His mother's health improves, and she gets better day by day, with Rajni visiting her frequently. His mother is so pleased with Rajni that she even gives her the family jewels. Then the mother and son receive the shattering news that Rajni is not who she claims to be; she's actually a prostitute named Champabai. Is it too late to save the family jewels, the lost respect in the community, and Mohan's mother's life--will she relapse after this?—rAjOo ([email protected])