A mysterious phone call from an anonymous man leads police officer Sartaj Singh on a chase around Mumbai in a dangerous cat-and-mouse game.

To save Nayanika, Sartaj intervenes during a RAW operation. In 1992, as political unrest increases, so does the bloodshed from Gaitonde and Isa's feud.

To save Mumbai from impending doom, Sartaj races against time to find out who Gaitonde's third father is and what's planned to happen on the 25th day.