Kanchenjungha Express plot
Inspector Surya Sekhar Gupta meets Ranjana on the Kanchanjungha Express train. Ranjana tells him the story of her friend Nandini, whose two husbands Bhaskar Majumdar and Raj Burman and live-in partner Vikram Sinha died under suspicious circumstances. Surya understands that Ranjana is actually Nandini, the suspect behind the three murders he was looking for. He confronts her with the facts, but Nandini's mentally ill sister Raka admits that she killed the three men because they tortured her sister. Raka is sent to a mental hospital for treatment, but doctors are increasingly convinced she didn't commit the murders.