Despite having a prestigious position as one of the leader in the army of US, Cage (Tom Cruise), turns out that has no stock for being involved in a battle field. Since the colonialism field is getting expanded, the power should be used to empower the army.
In the middle of his awkwardness in the battle field, he is forced to use a gun. But, there is a weird incident happened to Cage, after succeeded beating a special alien, alpha, Cage always repeat such an accident since he firstly got the task as a soldier. Cage gets confused and desperate with this weirdness. Then he meets a prime soldier named Rita (Emily Blunt).