In 2126, He Yiting, captain of the Lamplighters in the refugee district, discovers that her adoptive sister Duan Qi has climbed to the top of the Dome Game leaderboard. She defies the iron rules and breaks into the death game "Zero-Out Game", which uses jumping domes as bait. The game is actually a dome trap, and players disappear in reality as they are eliminated in the game. In the instance dungeon, He Yiting reunites with Duan Qi, who is undercover investigating the truth. Together with players like KK and Lu Chenzhou, the two team up to clear levels and uncover the truth behind the game.