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.