Summary North Bihar 1951. Byomkesh is visiting a rich landlord Mr Choudhary (Rajendra Gupta), near Calcutta, who has invited Dr Ghatak (Veerendra Saxena), Photographer Nakul Sarkar (Kanhaiya Nathani) and his wife, Mr Shome (Raj Kamal) (a property owner), Ushanath Ghosh (Avinash Masurekar) (accountant of Govt treasury) & his wife, Bank Manager Mr Amar Raha (Ravi Jhankal), area DSP Purandar Pande (Prem Bedi). Mr Choudhary explains the case of this bizarre theft in his house, in which someone just stole a picture hung on the wall & its negative. It was a group photograph of a picnic a month ago, taken by Nakul. There were 3 copies of that photo, 1 with Ushanath & other with Shome, & none can confirm whether it has been stolen from their houses or not.

Byomkesh also meets Falguni Pal (Prashant Jaiswal), a poor man, who claims to create portraits from his memory & proves that by creating one of Mr Choudhary. Satyavati likes Choudhary's daughter Rajni (Sadiya Siddiqui). But Mrs Shome tells her that she is a widow & yet dresses like a virgin. She believes that Rajni does that to snare an eligible bachelor.

Shome tells Byomkesh that his father-in-law sponsored his studies, but he could not make a successful career & now lives in a house funded by his father-in-law. The picnic photo in his possession was destroyed by his wife, as in that photo Shome & Rajni were standing close together. Byomkesh also notices Rajni passing a note to Dr Ghatak in the party secretly. Nakul has taken a loan from Choudhary to acquire land. Ushanath is a proud civil servant & doesn't associate himself with landlords and their ilk.

Ushanath reports a suspected burglary in his house, the thief could not steal anything as the key to the locker is still stuck in the locker. Only a silver ornament is claimed to be missing. Byomkesh inquiries about the picnic photo, and Ushanath express fake surprise/shock when he finds that photo missing from his album. He momentarily lifts his black goggles & Byomkesh notices that one eye of Ushanath is made of stone. Ushanath implies that Falguni Pal was seen near his house on the day of theft.

Byomkesh witnesses the romance between Dr Ghatak & Rajni, and Dr Ghatak is in a hurry to marry Rajni. Falguni Pal commits suicide by jumping into a well at Choudhary's property. Post Mortem reveals that Falguni was killed first & then his body dumped into the well. His stomach had high quantities of opium.

Dr Shome's wife Malati (Reshma Gopal) falls ill. Ajit had witnessed Malati following Dr Shome into the house in middle of a winter night. Byomkesh meets Dr Ghatak & inquiries about Rajni but is rudely brushed off. Amar Raha tells Byomkesh that Falguni had come to him on the day before his death with his portrait. Choudhary tells Byomkesh that Rajni has left for Calcutta on the pretext of a false telegram. Byomkesh knows that Dr Ghatak, Ushanath & Nakul are already planning to travel to Calcutta. Choudhary has also received an anonymous letter saying that Dr Ghatak is a fraud & should not be allowed near Rajni. Byomkesh travels to the train station & apprehends Amar Saha, who shoots himself fearing arrest. Huge sums of money are recovered from his luggage. Amar had chosen that day to escape with the cash, as the next days were bank holidays, which would give him a 48 hour head start, before the theft is discovered. Byomkesh reveals that of all the men who attended the picnic, only Ushanath & Amar were previously unknown, were handling large sums of money, & would profit from anonymity. Ushanath had one eye of stone, therefore it will be difficult to hide himself.

Amar was planning this heist for months & had dreams of settling in London. But the photo was taken & could lead to him being traced. So, he started stealing the photo from Choudhary, then Nakul, then Ushanath. But then Falguni arrived, who could create portraits from memory. So, Amar had to eliminate him. The letter to Choudhary was written by Dr Shome, who loved Rajni, but despised his wife. However, Rajni had already eloped with Ghatak

• Adventure
• Crime
• Mystery
• Thriller