A modern young man unexpectedly transmigrates into Great Yu as Xie Yun, the powerless and influence-less Seventh Prince. He grows up treading carefully in the palace, yet still cannot escape the struggle for the throne. The ambitious Third Prince secretly sets a deadly trap, fabricates charges of treason against him, and has him thrown into the imperial prison and sentenced to death. At the brink of death, Xie Yun successfully activates the Heroes Summoning System, allowing him to summon the civil officials, military commanders, and peerless talents of every dynasty in Chinese history. With his extraordinary acting skills, he wins the Emperor’s sympathy and escapes the death sentence, but is sent into exile to Yinchuan to guard the frontier, commanding only five hundred elderly and infirm soldiers as an eighth-rank commandant. Establishing himself in the western borderlands, Xie Yun recruits talented people, trains elite troops, protects the people, and revitalizes the economy. He repeatedly defeats the steppe barbarians and swiftly gains a foothold at the border. Turbulent currents swirl beneath the court, and old cases are full of unanswered questions. Fearing Xie Yun’s rise, the Third Prince takes a desperate gamble and murders the Emperor to usurp the throne. With a mighty army and peerless strategists and generals at his command, Xie Yun rises in righteous fury, marches south to purge the court, brings an end to the chaos, topples the corrupt Great Yu, and ultimately unifies the realm, founding a unified dynasty and ascending to the supreme imperial throne.