In the year 2045, a deep freeze swept across the globe, temperatures plummeted to minus fifty degrees, and civilization collapsed. Xia Hao struggled in the apocalyptic world for ten years, personally building a survival base for three hundred people, only to be shot in the back and killed with bitter resentment by his trusted cousin, Xia Qiang. The hatred right before death allowed him to be reborn back to thirty days before the disaster. Armed with ten years of memories, he sold his house and took out loans to gather massive funds, frantically hoarding food, fuel, and medicine, transforming an abandoned civil air defense project into an indestructible underground fortress; and right before the freezing struck, he took the down-and-out infrastructure engineer Lin Jianjun, sharp-tongued female doctor Su Wan, retired military king Zhang Bao, and agricultural genius Chen Mo under his command. When the freeze arrives, he rules the ups and downs.