Satinath Chowdhury gets his family to their century-old family home in Santiniketan for his will reading, but soon lures them to engage in a hunt for a hidden ancestral treasure.

While everyone grapples with the first clue of the treasure hunt and navigate their inner struggles and crises, Satinath plans a family picnic.

Amidst personal turmoil, the treasure hunt turns to a vendetta when everyone decides to summon the spirit of the late Hemnath Chowdhury, the mastermind behind this puzzle.

Haimanti gets furious on learning about Pritha and Rafique's relationship. Childhood memories lead Mrinal to search for the headless king to whom the treasure is linked.

When Nikhilesh gets abducted, Satinath turns the family into a battalion to save him. Polash discovers a secret tunnel with the help of the mysterious keys.

After rescuing Nikhilesh, everyone looks for the tunnel. In the end, when Satinath reveals the truth, the eerie reality shocks everyone.