Byomkesh disentangles himself as the truth-seeker, who with friend and writer Ajit uncoils the mystery behind the bizarre murders.

Byomkesh is on one of his private missions with Ajit. As he decides upon setting his foot forward on a new journey, he meets Satyabati for the first time.

Truth seeker Byomkesh indulges in romance and poetry, till a flamboyant Satyakam comes to him with a weird proposal: to investigate his own murder mystery.

Satyakam predicted his murder that has come true. Byomkesh has to reach to the root cause of the murder and find out what lead him to predict his own end.

A theft at Maharaj Ramendra Singha's palace leads Byomkesh to investigate a royal case of the Blue Sapphire.

When industrialist Debashish becomes the target of a ruthless murder plan, Byomkesh enters the scene to unmask the person.

Byomkesh comes to know Debashish has an unhappy marital life with wife Deepa, as she loved someone else. Is the murderer someone really close then?