The apocalypse ends, and humanity is pulled into a pure white building of infinite stories. True and false rules refresh every day, and violating them invites eerie hunting; only one's own bed is a safe zone. The female protagonist Liu Yi is calm and meticulous, leading four companions with different ulterior motives to survive in the crack between rules and human nature. This building is not a sanctuary, but a cycle of screening and domestication. What she wants to do is to shatter it.