Byomkesh Bakshi is a Bengali detective (though he likes to be addressed as Satyanweshi, eng. truthseeker) who takes on another spine-chilling case with Ajit Kumar Banerjee, his friend who is a novelist.
The story Adim Ripu starts off with local goon Bantul Sardar offering firearms left behind by departed American WW-II soldiers to Byomkesh and Ajit in their Harrison Road, Kolkata residence. Sardar's departure is quickly followed by the arrival of Miss Nanibala Roy. Ms. Roy has an adopted son Prabhat Roy, who is also the foster-son of rich businessman Anadi Halder. Halder being single lets Ms. Nanibala Roy manages his household.
Halder has two nephews Nimai and Nitai who obviously have ill feelings towards Prabhat in the context of the inheritance of Halder's riches. Additionally, Halder had recently blocked Prabhat from marrying a girl he likes, and it is suspected that Nimai and Nitai have something to do with this.
Ms. Nanibala Roy is apprehensive about her adopted son's safety.
Anadi Halder is murdered, and the story takes a fascinating turn with an extremely surprising ending.[2]
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