The story unfolds in a near future in which a hive-like alien race, called Mimics, have hit the Earth in an unrelenting assault, shredding great cities to rubble and leaving millions of human casualties in their wake. No army in the world can match the speed, brutality or seeming prescience of the weaponized Mimic fighters or their telepathic commanders. But now the world's armies have joined forces for a last stand offensive against the alien horde, with no second chances. Lt. Col. Bill Cage (Cruise) is an officer who has never seen a day of combat when he is unceremoniously demoted and then droppeduntrained and ill-equippedinto what amounts to little more than a suicide mission. Cage is killed within minutes, managing to take an Alpha down with him. But, impossibly, he awakens back at the beginning of the same hellish day, and is forced to fight and die again and again.