A married couple from Kolkata, Deboshree and her husband Sumit, move to a village. There, they move into a supposedly haunted mansion which belonged to Sumit's ancestors. Deboshree then goes into the restricted room and finds out that there was a dancer named Chandramukhi who had been killed by a zamindar (a Persian word meaning "landlord"), who lived in that mansion. After mysterious occurrences in the mansion, which appear paranormal, Sumit calls his psychologist friend Dr. Agni from USA, as he believes that there is no ghost. He believes that Malini who could not marry him is mentally ill and behind all those incidents. But Dr. Agni makes more comic misunderstandings. Also, Dr. Agni starts to like Malini. But the fact everyone is still unaware of is that there is truly Chandramukhi's spirit who is freed after 150 years when Deboshree unlocks the mysterious room.
In the climax, it is revealed that Deboshree suffers multiple personality disorders and because of her sympathy for Chandramukhi, she starts believing that she is Chandramukhi. She thinks that her husband is the cruel zamindar responsible for Chandramukhi's death, and she must take her revenge by killing him. The fact that Chandramukhi's spirit exists and possesses Deboshree is still unknown to Dr. Agni. Dr. Agni devises a plan and makes Deboshree 'kill' a doll instead of Sumit. Thinking she has killed Sumit and exacted her revenge, the spirit of Chandramukhi is also satisfied and it leaves the body of unwell Deboshree. At the end of the movie, a hypnotized Deboshree regains consciousness as her usual self. And Dr. Agni marries Malini.