The Mall is a road in the City of Westminster between Buckingham Palace at its western end and Trafalgar Square via Admiralty Arch to the east. It is closed to traffic on Sundays, public holidays and on ceremonial occasions.
Major Bill Cage is an officer who has never seen a day of combat when he is unceremoniously demoted and dropped into combat. Cage is killed within minutes, managing to take an alpha alien down with him. He awakens back at the beginning of the same day and is forced to fight and die again... and again - as physical contact with the alien has thrown him into a time loop.