After a prank goes wrong, one person is left dead and another institutionalized. Ten years later, a group of friends are partying at a cabin in the woods unaware that a deranged psychiatric patient has escaped and is hell bent on revenge.

During a family gathering, dinner is interrupted by a knock at the door. 5 intruders take the guests hostage and put them through a series of sadistic games. As the night goes on, the intruders realize they also may have something to fear.