In a contemporary interpretation of war torn Calcutta during the 1940's, the film follows the first adventure of Byomkesh (Sushant Singh Rajput), fresh out of college, as he pits himself against an evil genius who is out to destroy the world. It's his wits against the most villainous arch criminal the world has seen, in a world of murder, international political intrigue and seduction.

The film is based on the fictional detective Byomkesh Bakshi created by the Bengali writer Sharadindu Bandyopadhyay. The film stars Sushant Singh Rajput, Anand Tiwari and Swastika Mukherjee in principal roles.