Byomkesh had fallen critically ill and is being nursed back to health by his wife, Satyabati (Ushashie Chakraborty), and dear friend, Ajit (Saswata Chatterjee).

At Dooars, Byomkesh meets Bengali inhabitants from the local community like Dr. Ashwini Ghatak (Sujan Mukherjee), Prof. Adinath Shome (Pijush Ganguly), Mahidhar Chaudhury (Biswajit Chakrabarty), photographer Nakulesh Sarkar (Arindol Bagchi), police officer Purander Pandey (Kunal Padhy), deputy magistrate Umanath Ghosh (Chandan Sen) and banker Amaresh Raha (Kaushik Sen).

The flow of the party is somewhat interrupted by the sudden arrival of Falguni Pal, a poor artist, who has the rare talent of painting anyone's portrait after seeing his subject for only a few minutes.

Matters take a more serious turn when there is yet another attempted robbery, this time, at the house of the deputy magistrate, Umanath Ghosh.

In yet another twist, Byomkesh finds out that both Adinath Shome and Ashwini Ghatak are romantically inclined towards the beautiful Rajani.