Prakash and his older sister (Naseem Banu) live a poor life, and are unable to pay their rent. Laat saheb (Prem Adib) is from a rich family, but having left home, lives as a poor homeless man. He tries to help the brother and sister get something to eat. He ventures out during curfew hours and is caught by the police, but is able to hand the food to the brother and sister. The sister develops a soft spot for Laat Saheb. However, the neighbours insist that she be put out of her house as she is having an affair with Latt saheb. When Prakash dies due to an accident, his sister thinks of moving from their rented accommodation. Travelling by train, she again meets up with Laat saheb, who is going to see his unwell mother. During the journey he lets her know that he loves her, much to her joy. The train they are in meets with an accident and she is presumed dead. She ends up in a hospital where she meets Professor Nath (Surendra), who takes her home as she has lost her memory. He renames her Kamini and blocks any means of her regaining her memory since he's fallen in love with her, and does not want to lose her. Laat saheb re-enters her life and tries to help her remember her past. Finally, she regains her memory and goes off with Laat saheb, leaving the Professor behind.