Classic puzzle: a corpse in a room locked from the inside. New York Police Lieutenant Eve Dallas will have to puzzle over not even who killed the young king of the computer game empire, Bart Minnock, but how the killer managed to do it. In a tightly closed room for topographic games, guarded better than armored safes, the body of the ruler of hyperreality was found, but the alleged murder weapon - a huge two-handed sword - was not found. Eve's devoted husband, billionaire Roarke, enters into a game with the criminal, despite the high stakes. Play time is limited. And now Eve needs to check many versions in order to finally find one - unthinkable, fantastic, but the only true one.