A group of young U.S. military techs borrow a top-secret combat simulator for a weekend of unauthorized gaming. But when they set up the system inside an abandoned prison used for the torture of post-9/11 prisoners, they discover that someone, or something, has uploaded itself into their A.I. software. A deadly new player has now joined the game: How do you survive the final level of lock-and-load virtual reality when escape is impossible, slaughter is uncontrollable and the enemy is unstoppable? the ultimate battle begins inside the Ghost Machine.