The protagonist, Arisu, is a video game enthusiast who, along with his friends Chota and Karube, suddenly finds themselves transported to a deserted version of Tokyo. They soon discover that they are not alone in this world, and they encounter other survivors who have also been brought there. However, they quickly learn that the only way to stay alive is to participate in the games set by mysterious beings known as “Game Masters.”
Each game has a set of rules and objectives that the players must complete to progress. Failure to complete the game results in death, and the stakes only get higher as the players move through the different levels. As they navigate the dangerous world and its deadly games, Arisu and his friends must use their wits and skills to survive, all while uncovering the truth behind their predicament and trying to find a way back home.