Xiang You, a modern engineer, accidentally traveled to the end of the Warring States Period and rose to the center of power in the Qin State as a debater in the Qi State. He relied on modern knowledge to carry out salt and iron reform, crack down on collusion conspiracy, open up Bashu, and gradually promoted from guest minister to minister of Zhuguo. During this period, he had complicated emotional entanglements with female characters such as Ying Hua, A Li, and Tian Zhen, and at the same time discovered the existence of time traveler organizations such as "Historical Correctors". In the entanglement between the political mission of helping the unification of Qin and personal love, and the ultimate choice of history, Xiang You finally activated the space-time device after the victory at Hangu Pass, leaving behind a closed loop of history and an emotional aftertaste.