In a world where everyone has been transported into a survival game, Lin Qian becomes a survivor in the Infinite Building. Every door in the building leads to an unknown new world. While other survivors hesitate to venture outside, Lin Qian becomes an overseer after a wager. A Level One Overseer earns one free attribute point per day. The worlds behind the doors feature various scenarios, including zombie crises, supernatural resurgences, and cyberpunk settings, but no one knows what lies beyond each door. Missions include cleanup tasks, survival tasks, and regional trials. No matter what methods they use, there is only one way to stay alive: become stronger.