Traveling through time to become Xiao Linyuan, the heir of the Prince of Zhenbei, he is framed by the current prime minister and exiled to the perilous Hangen Pass in the northern wilderness. Relying on modern resource management thinking, he dismantles assassination plots step by step, recruits death-row prisoners, trades for food, horses, and artisans, and turns the tide to manage the dilapidated borderlands. Rising step by step from a discarded heir to stage a counter-attack, he stands firm in Hangen Pass, vowing to make the entire imperial court kneel and beg the Prince of Zhenbei to return.