Under the long-term impact of the nuclear wastewater incident, world wars broke out one after another, resources were depleted, the geothermal crisis intensified, viruses continued to mutate, and wasteland enveloped the human world in a short period of time. When mankind is dying, it establishes the Human Salvation Coordination Bureau and announces the implementation of two rescue plans, namely, the Pocket Watch Plan: try to put all mankind into cryogenic chambers to avoid the coming doomsday; The Compass Plan: teams that gather almost all scientific research power of mankind will study the doomsday rescue plan in the central fortress in their respective regions. There is only one condition for the rescue plan to be stopped, and that is the dissolution of the Human Rescue Coordination Bureau.
In 2333, in the doomsday wasteland, a handful of surviving humans hid in an abandoned underground air raid shelter called the "Cave". They faced not only radiation, wasteland and exhaust gas, but also strange mutant creatures. . . The Rescue Coordination Bureau has disappeared without a trace, all central research institutes have been completely abandoned, and empty dormant pods are constantly being discovered. . . Is the future of mankind to continue to live and wait for death to come, or is it? . Escape to the sky?