Bobby is a strange wealthy young woman living alone in Mumbai and working as a dubbing artist. In childhood, she had interfered in a fight between her parents, causing them to fall off the terrace to their deaths. When a producer touches her at work, she reacts by slicing his nose with a knife. She is then sent to an asylum. Her uncle manages her property and offers her house as a rental to a young married couple. Keshav is the husband to Reema. Bobby is obsessed with the couple and spies and stalks them constantly. Reema dies in a fire in the kitchen when a bottle of pesticide explodes. Bobby suspects Keshav and tries to get the police to investigate him but they find no evidence. She hallucinates Keshav threatening her and hits him with a chair in front of the police. She is put back in the asylum. It is revealed that she is imagining things; during electric shock treatment, she remembers that she threw the pesticide on the wife because she hallucinated a cockroach on her.