On their trip to Hazaribagh, Feluda and his comrades meet Pritin, Mahesh Babu's youngest son. Meanwhile, they learn that a tiger escapes from the Great Majestic Circus.
They go for the picnic in Rajrappa, but Mahesh looks upset for his second son, Biren, who has been missing for a long time. While everyone enjoys themselves, Pritindra comes, shocked, and exclaims "Baba".
Mahesh suffers a brain stroke and eventually passes away, assigning Feluda to solve his death mystery and the absence of Biren. While Feluda investigates the case, Topshe and Jatayu spots the missing tiger.
Someone attacks Feluda, trying to steal something, but he has almost solved the mystery by this time. On returning Mahesh's belongings, he gets hold of another piece of evidence.
