Summary Calcutta, 1959. Nilmani Majumdar (Naresh Suri) is a retired police officer. He retired 7 years ago, is originally from East Bengal (Bangladesh), but was posted in Calcutta for a long period of his career. Nilmani never got married in his life. Nilmani tells Byomkesh of 1 unresolved care of his career. 3 years before retirement, in Calcutta, Nilmani was on his unannounced rounds of the city on his cycle, with a gun & a torch. At midnight, He sees 4 men carrying a dead body, who run away when they see a policeman coming. The dead body was of Hema (Kuldip Kaur), wife of Someshwar (Karunakar Pathak). Someshwar is found gambling at his friend Kali Das's (Vinay Malhotra) house with 2 other people. He claims that he was playing cards from 8 30 pm to the time Nilmani arrested him.

Someshwar is a rich trader with income of Rs 60,000 +. He married Hema 7 years ago, & his father-in-law's name is Deen Mani Haldar. Someshwar claims that he knew Hema was seeing someone as that person was coming home late at night. Hema also had jewelry in her possession, which was not given by Someshwar. Someshwar is not happy at his wife's death but is not apologetic either.

Kali Das says that he knew Hema's parents. Her father was a drunk & thief, while her mother used to enjoy male company, when Deen Haldar was in jail. Kali was not in favor of Someshwar marrying Hema. Someshwar married Hema when he was poor and didn't have any wealth, at that time he thought a girl from a poor background will be good for him. But as his trading business got going, and his income rose, he increasingly felt that Hema was not the right fit for him. Someshwar was a military contractor. The 3rd friend had a business of supplying wood for cremation. The 4th friend was a contractor and used bamboo for scaffolding, the same type which Nilmani found on the harness used to transport Hema's body. All the signs point to the 4 men, but Nilmani has zero proof of their involvement.

Someshwar and Kali are released on bail and Someshwar goes back to his home. Post-Mortem reveals that Hema died at about 10 pm. Hema was killed by damaging her neck artery, with a technique that's trained to soldiers for hand-to-hand combat.

A couple of days later, Someshwar is also found dead in his home, killed by the same technique used on his wife Hema. Byomkesh asks a few more questions from Nilmani. Someshwar had not will and his entire wealth went to his niece. The night when Somheswar died, the 3 friends were playing cards at Kali's house without Someshwar. Byomkesh asks Nilmani the name of Hema's wife, and he takes a name instantly.

Byomkesh declares that Hema was killed by Someshwar and Someshwar was killed by Hema's father. Hearing this Nilmani hastily leaves. Byomkesh explains to Ajit that in fact Nilmani was Hema's real father. Hema's mother was not faithful to her husband Deen Mani. She was having relations with Nilmani, while her husband was in jail. That's how Hema was born.

Shortly thereafter Nilmani was transferred. But Hema was his only living relative & he kept track of her. He was posted back to Calcutta before his retirement. Nilmani had the habit of late-night city rounds & used that time to visit Hema and to give her minor gifts. Someshwar murdered Hema with a chop to her neck. He and his friends were taking Hema to be burnt when Nilmani saw them. They ran back to their cards game & came up with a back story that they all stuck to. When Nilmani understood how Hema was killed (by the Post-Mortem report), he killed Someshwar the same way.

• Adventure
• Crime
• Mystery
• Thriller