A group of young U. S. military technicians Tom (Sean Faris) and Vic (Luke Ford) steal a military software used for training soldiers to handle critical situation for one weekend in order to use it for playing games. They set it up inside a long abandoned prison which was earlier used to keep and torture prisoners after the 9/11 attack. However, they realize that something in addition to the software is present in their gaming system. It seems that a vengeful ghost Prisoner K (Halta Williams) has joined them in the game and is trying to torture and kill them in the virtual world.