Modern special forces king Chen Mo accidentally time-travels to become an ancient aristocrat exiled to the frontier. Facing the Northern Di cavalry and the desolate border pass, he relies on special operations skills to train troops, set up ambushes, and launch surprise attacks, accumulating military achievements in bloody battles, rising from an abandoned son to a frontier commander-in-chief. He further brings modern knowledge into ancient times to improve farming tools, build water conservancy, promote new crops, reform steelmaking and military systems, establish an intelligence network, and develop commerce, turning the barren frontier into the foundation of a powerful nation. Court intrigues, surrounding hostile nations, and the backlash of old forces follow one after another. Chen Mo breaks the deadlock with modern thinking and establishes his authority with iron-fist methods. He will not only rewrite his personal destiny, but also drive the transformation of the entire era.