Zhang Su, a twenty-eight-year-old convenience store clerk in Qincheng, lives a mundane life defined by low wages and high costs. His nights are spent observing the city's eccentricities, from embarrassed students buying contraceptives to wealthy heirs on flashy motorcycles. However, the monotony shatters when a nationwide cold wave warning escalates into a catastrophic global event.

As temperatures plummet and society crumbles into chaos, the thin veneer of civilization vanishes overnight. In this brutal new world where resources are scarce and morality is a liability, Zhang Su discovers that his pragmatic, unemotional nature is his greatest asset. While others panic or cling to fading hopes of rescue, he quickly adapts to the harsh reality of survival.

Facing mutated threats and desperate humans alike, Zhang Su embraces a ruthless philosophy: to live, one must be willing to do whatever it takes. This is the story of an ordinary man transforming into the apocalypse's most feared survivor, navigating a frozen hellscape with cold calculation and absolute determination.