Modern time-traveler Shen Hao uses medical skills and governance methods that surpass the era to win the support of the common people, while the Bailu faction also grows rapidly after the disaster. Meanwhile, undercurrents surge in the imperial court, and royal secrets and various schemes gradually come to light. Just as the maritime war in the south has settled, the northern border faces an invasion by strong enemies. To protect the people, Shen Hao leads his core forces to the frontline, rushing to the aid of the northern army with modern supplies, advanced equipment, and superb strategy, as a decisive battle determining the fate of the northern border officially begins.