Red snow descends upon the world, extreme cold strikes, and the borderlands of Dajian suffer continuous floods and snowstorms. Lu Yuan trades his ancestral home for Black Stone Mountain, builds an ice fortress amidst doubt, and takes in neighbors to escape the cold and spend the winter. Bullies fight for land and wild wolves disturb the camp, which he resolves one by one with rules and methods. Capital physician Su Qinghan puts aside her pride and coordinates medicine. The snow gradually melts, fields reopen, and everyone unites to turn the barren mountain into a secure new home.