There is a mysterious dimensional game called "Lie" in reality. It randomly "invites" people in desperate situations to participate. The game scenes are ever-changing, from classical secret rooms to futuristic cities. Each copy is a survival test based on specific rules. Level-clearance rewards can also be realized in reality (money, skills, props). Behind the game lies an AI consciousness created by an ancient civilization, which aims to find the possibility of its own evolution by observing human nature in extreme environments.