While everyone else scavenges for garbage, dodges disasters, and clings to powerful people to stay alive in the apocalypse, Gu Lang turns doomsday into a wilderness survival business venture. An ultimate survival enthusiast, Gu Lang lives by the motto, 'When others panic, I stay calm; when others fall into chaos, I make money.' When he encounters a scammer on the subway, he stirs up trouble. When someone hogs a seat on a train, he teaches them the law on the spot. When a nuclear explosion strikes, he calculates his basal metabolic rate before hiding in a basement. He disguises a vehicle carrying medical waste to frighten guards at a checkpoint, and roadside bandits end up having their equipment and supplies looted by him instead. As he heads south, he accumulates gear and stockpiles supplies. The apocalypse may descend into chaos, but the scientific know-how hardwired into a survival maniac's DNA must never be compromised.