A movie "highly influenced" by Christie's Mousetrap. A woman, ex manager of an orphanage is murdered by a man in overall. On the way he is stopped by a laborer for a matchbox, and there he drops a paper, a handbill of a hotel-resort. The labors give this handbill to police. The hotel resort is run by a very young couple (not yet hitched), Kanika (Tapati) and Prabir (Robin). The river is flooded and the hotel is marooned. Just before it becomes unreachable, a series of guests arrive, some expected, some unexpected. An old arthritic man Beni (Chhabi), a man with car broken down Veeraswami (Jahar Ganguli), a choleric spinster Miss Dhar (Sushama), a semi-crazy young man Madhusudan Dutta (Prabir Kumar), an short tempered doctor Vajpayee (Samar) and a spirit (the house is haunted). In that condition the policeman Inspector Ghoshal (Tarun) arrives. The murder that took place was a revenge murder, by the inmate of an orphanage run by her, and the murderer is about to commit a few more, of those linked to that orphanage and now at this hotel. Who is the murderer? Who are going to be murdered? All the people in that hotel are under fictitious names, for different reasons.