The plot revolves around a series of mysterious murders where the victims are young, ambitious girls. Police officer Khan discovers that all the murders are committed near the house named Plot No. 5. Two brothers, Ajay and Sanjay Mehra, live there with a servant. Sanjay uses a wheelchair. Mr Verma, a friend of the Mehra brothers and a family doctor, often comes there. The police suspect all of them. Finally, it is revealed that Sanjay had killed all those girls who had taken pity on his disability. Ajay had tried to take his brother's crime on himself due to his guilt emerging from the fact that he had unintentionally made his brother disabled.