Byomkesh leaves the house to attend Rakhal's birthday. Although he asks Satyawati and Ajit to come along, they refuse and say that they have other plans. Later, Rakhal gets a call about a murder in the hotel.Byomkesh and Rakhal question Sobhana and other guests including the employees in the hotel. They ask for full cooperation to solve the murder case and inform everyone that they should not leave the city until the completion of the investigation.Byomkesh convinces Lotika that he will not reveal her secrets to anyone. While interrogating, he comes to know about her past relationship with the star, Swarup Kumar. She also reveals that Swarup blackmails her for money. Will this discussion help Byomkesh to find out the truth?While Byomkesh investigates the murder of Swarup Kumar, the boarders of the hotel protest for being held captive by the police. Dr. Roy finally confesses to Byomkesh about the crime she has committed.