First Assistant Director
A battle for power ensues as warring gangters thrive to gain possession of a "black box" that can make them richer than they already are, and an undercover cop intervenes with the help of his sharp intellect and an instinct to kill.
Second Assistant Director
Byomkesh, fresh out of college, agrees to investigate the disappearance of Bhuvan, a chemist. Assisted by Bhuvan's son Ajit, Byomkesh links the case to a larger conspiracy that will unsettle Calcutta.