The movie consists of two Feluda stories by Satyajit Ray, Samaddar-er-Chabi and Golokdham Rahashya, shown on either half of the film. It was a tribute to the 50-year anniversary of Feluda and a sequel to Royal Bengal Rahashya (2011).

A rich man falls in love with an idealistic medical student. However, when circumstances force them apart, he learns the true meaning and value of love.

Feluda and his gang gets invited to North Bengal by a wealthy Zamindar to solve a piece of a puzzle supposedly leading to buried "treasure", but things take a turn for the unexpected with a mysterious death and rumors about a man-eating tiger in the jungles.

Abhiroop Mukherji, an ambitious scientist, is trying to connect with aliens and finally succeeds in his experiment. But when a gangster kidnaps him to gain power using his experiment, an unexpected friend helps him.