Three years after the death of his beloved wife Mina, retired Professor Dr Apurba Sanyal is convinced that her supernatural presence exists, and is trying to find out what her last words were. His daughter Apu however, is certain that he is mentally ill and needs treatment. The housekeeper Ramukaka too is a non-believer; until something happens one night. Whether the mother really exists or it is something more psychological is left to be understood …