Yue Mu transmigrates into the body of a foolish son of a disgraced minister in the Great Qian dynasty. After his family is discarded and punished with exile by Emperor Yuanqi, known as the Gate-Begging Emperor, Yue Mu protects his mother during the journey and kills the corrupt officials who threaten them. Drawing on his late father's prestige, he seizes the Three Passes and uses ingenious tactics, including smoke screens and horse-chopping sabers, to conquer cities and win the people's hearts while securing food supplies. As he battles imperial armies, the emperor's uncle's elite assassins, and Western Regions forces, he raises an army under the banner of purging traitors and restoring the rightful ruler. Step by step, he dismantles the corrupt court, igniting a rebellion in which the people seek revenge and the fate of the empire is turned upside down. A thrilling battle of power and strategy unfolds.