A nuclear war breaks out in 2045 AD (the Great Collapse), and the story begins in 2077 (the thirty-second year after the nuclear war). The global nuclear war lasted for 72 hours, and 90% of humanity died. The survivors were divided into underground shelter residents, surface wanderers, and fallen predators. Hope breeds in despair, and the radiance of humanity illuminates the wasteland; it does not deliberately exaggerate darkness, but focuses on showing warmth and redemption.
