Lu Nange gets into a car accident and crosses into a male-oriented doomsday novel, becoming the short-lived younger sister of the male protagonist's brother. Her father dies to save her, and she binds with a check-in system, taking her autistic younger brother Lu Beiye to stockpile supplies, guard tall buildings, and wait for her older brother Lu Xici to return. However, the plot has already derailed: her younger brother turns out to be an "old player" who has been reborn twice, and Chi Yanzhou enters early and awakens lightning-type abilities. Along the journey heading north, they encounter zombies, the white lotus Wen An, the split-up Su family, and human laboratories. Lu Nange grows from a cannon fodder wanting to ride the male lead's coattails into the core of wind-type abilities. Upon arriving in Qu City, they learn that the Su family is harming survivors using "Paradise" and laboratories, and they ultimately decide to team up with local rebels to fight for freedom with their lives.