Mumbai police commissioner Prakash Rathod (Anupam Kher), resting after a jog, describes in a voice-over that he is going to retire the following day. He goes on to describe the most challenging case he faced in his career.An unnamed man (Naseeruddin Shah) carries a travel bag, assumed to contain explosives, in the Chatrapati Shivaji Terminus railway station and proceeds to hide the bag in the restroom of a police station opposite to the Mumbai Police headquarters. He then arrives on the rooftop of a building under construction where he has set up his base of operations, equipped with several sim cards, mobile phones and other electronic gadgets. He calls Rathod and informs him that he has placed five bombs in locations throughout Mumbai and has programmed them to explode simultaneously within four hours unless the Commissioner gives in to his demands and releases four militants.: