When private investigator, Byomkesh Baksi, falls ill, he takes a vacation to a town in the foothills of Himalayas with his wife, Satyabati, and his best friend, Ajit. The quiet town is full of colorful, cheerful characters. But when a photograph theft is followed by a horrific murder, Byomkesh understands that no one in the town is what they seem to be.