During the Zhenguan era, an office worker from the twenty-first century time-travels to become Li Shimin's third son, Li Ke. He originally wanted to loaf around as an idle prince, but accidentally activates a strategic warehouse. Inside, food supplies, military-industrial equipment, and modern technological data are all fully stocked. He runs a newspaper to control public opinion, builds a steel mill to break the aristocratic families' monopoly, and uses KPIs to reform the system. In the imperial court he outwits Zhangsun Wuji, in the marketplace he gathers the hearts of the people, and before he knows it, his power has reached the skies.