A group of friends take a trip to visit a someone they haven't seen in years. When they arrive at her remote home in the woods, their dinner is interrupted by a knock at the door. 5 masked strangers have arrived with the intention of playing a deadly game with the guests.

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.