Set against the backdrop of The Partition, Byomkesh Bakshi and his assistant Ajit must solve the murder of the head of the dysfunctional Halder family.

Byomkesh, a detective, stumbles upon a case of robbery while recuperating from a prolonged illness. With the only object to be stolen being a group photograph, he attempts to solve the mystery.

The film starts with the hint of another story 'Satyanweshi' where young Byomkesh caught the head of a cocaine racket who is now seeking revenge. On the other hand, a young girl dies in mysterious condition having a match stick in her hand. One Kokonad Gupta, who claims to be a fan of Byomkesh gifts him a matchbox.

Byomkesh is called upon for help by police to solve the murder mystery of a wealthy old man Benimadhab and his servant Meghraj. He and Ajit finds the case submerged in crooked intentions of family members.

The curtain rises on a small coalfield town. Plagued with a series of unexplained troubles that broke out suddenly, owner of a coalmine seeks the help of Byomkesh Bakshi to sort things out for him. When Byomkesh arrives with his trusted confidante Ajit, they discover to their complete dismay a maze of crimes woven around a violent murder that had little to do with the job that they were entrusted with. A mesmerizing mosaic of criminal characters, a sordid saga of lecherous lust, the thriller unfolds the complex layers of the human mind.

The story revolves around a retired judge, Mr. Sen, living in a farmhouse on the outskirts of the city. The people who stay in the colony are a handful of social outcasts. One day, the judge is found dead under mysterious circumstances, and Byomkesh takes up the case.