A crime repeats its pattern after 25 years .Is it the same killer or a new psycho on the streets?

Dwitiyo Purush is a sequel of Baishe Srabon where Prosenjit Chatterjee dies at the end. In this film we will see Parambrata Chattopadhyay as a police inspector who follows the path that Prasenjit Chatterjee showed him in Baishe Srabon to fight with criminals in various regions of kolkata.