Aritra Sengupta

Set inside a cramped prison and unfolding in a single unbroken long take, A Prison on the Equator follows a condemned prisoner who obsessively reasons through time, logic and fate as he awaits an execution promised to be a "surprise."

The film starts with the hint of another story 'Satyanweshi' where young Byomkesh caught the head of a cocaine racket who is now seeking revenge. On the other hand, a young girl dies in mysterious condition having a match stick in her hand. One Kokonad Gupta, who claims to be a fan of Byomkesh gifts him a matchbox.