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.

A would-be bank robber forgets his mask on his first big heist, and then botches an attempt to shoplift a replacement mask from a nearby convenience store. The store's clerk, a washed-up rock star, chases the thief and literally runs into a Yakuza to whom he owes money. Thus begins an all-night, three-way pursuit through the streets of Tokyo.