
Four years later, Byomkesh and Ajit are summoned to the opulent mansion of Karali Babu, a wealthy man found dead at his desk with a steel needle driven into his neck. The motive is clear: wealth. Karali Babu was constantly changing his will, pitilessly pitting his relatives—Motilal, Makhonlal, Phonibhushan, and the siblings Sukumar and Satyabati—against one another. While Vidhubabu focuses on the delinquent Motilal, who fled the house that night, Byomkesh looks deeper. He discovers chloroform marks on the victim and a missing needle from Satyabati’s sewing box. The tension rises as Satyabati, traumatized and beautiful, catches Byomkesh’s eye even as she becomes a person of interest.