A sudden global extreme cold snowstorm descended abruptly, temperatures plummeted drastically, and communications and electricity completely paralyzed. Protagonist Lu Yuan foresaw the disaster in advance, decisively sold his property, and entered an abandoned air raid shelter with his family and partners. He relied on the renovated and reinforced air raid shelter to build a survival fortress, hoarding sufficient food, fuel, and medicine, setting up a simple planting environment, and struggling to survive relying on pre-stored supplies. Outside, wind and snow raged, and the townspeople fell into the plight of hunger and cold. Lu Yuan guarded the bottom line of his own safety, extending a helping hand to the trapped compatriots within his power. In the long winter, everyone held fast to hope, waiting for rescue.