When disaster strikes in the 1970s, the surface world becomes a forbidden wasteland caught in cycles of otherworldly layers. As Bu Sui dies and returns again and again, she gradually figures out the rules. By her side is Gu Wang, who has made protecting her second nature. Together, they brave layer upon layer of bizarre looping trials, stockpile food and supplies, expose the core flaw in the otherworldly layers, and ultimately build a safe home on the wasteland that can shelter every survivor.
