An alien race has hit Earth in a relentless assault, the most competitive of any military unit in the world. Key William Cage (Cruise) is an officer who has never seen a day of combat when he is unceremoniously dropped into what amounts to a suicide mission. Killed within minutes, Cage now finds himself unexplained throw in a loop-time forced him to live with the brutal combat over and over, fight and die again ... and again . But with every battle, Cage becomes capable of participating in the enemies with increasing skill, alongside Special Forces warrior Rita Vrataski (Blunt). And, as Cage and Vrataski go fight with the aliens, each encounter repeated them one step closer to defeating the enemy.