Located in today’s London, a group of radical activists take over the annual gala of the energy company, seizing 300 hostages to display the hosts corruption. Their fair cause is abducted by an extremist in their ranks, who is ready to kill everyone in the building to send his anarchic message to the world. He falls to a former soldier, turning to clean the windows, played by Daisy Ridley, stopped 50 floors from the outside of the building to save those caught inside, including her younger brother.