Shekhar & ex-army doctor Jayavrat Saini team up to solve a series of murders in Lonpur marked by a "horse shoe" symbol. As Jayavrat evolves from roommate to partner, a shadowy figure known as "M" ominously watches Shekhar from the shadows.

Shekhar dives into a village scam where a jungle adventure leads to a bank heist. With a bride-to-be's father missing, he uncovers a tangled plot revealing a cunning robber with a grudge, while the looming threat of "M" draws ever closer.

Iraboty's arrival in Lonpur sparks intrigue as she convinces Shekhar to investigate the 150-year-old Skhondokhata legend in Purulia, linked to recent deaths in the Bhaskar family. Shekhar suspects a deeper conspiracy.