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.

Nirbaak is a hyperlink narrative comprising four love stories connected by a single woman. Every love story comprises one entity which is silent and thus Nirbaak (Speechless)