Genre:Fiction, Pages: 354, Binding: Paperback,Language:Bengali, ISBN:978-93-85524-10-3
Actually all of them i.e. Dr.Saswat Snyal, Dr. Soumya Sandal, nurse Lola, Dr. Madhuri and Leif had the strong motive to kill them. CID got five evidence of attempting of murder, like, Injecting poison, stabbing, slitting the neck, poisoning with food and lastly using tie to chock the neck (Fans). Actually who killed them can be known by going through the book.