Food delivery worker Ning Fan accidentally travels through time to the Dayu Dynasty, becoming a puppet monarch controlled by the empress dowager and powerful officials. Just as he wakes up, he avoids a crisis and awakens the Eternal Emperor System. Ning Fan summons fierce generals such as Dian Wei and Xiang Yu, uses the Jinyiwei to purge traitorous factions in the court, suppresses vassal rebellions, and dismantles the empress dowager's coup plot. When the East China Sea border is attacked, he leads an army across the sea on an expedition to rout the invading naval forces. When the northern nomad tribes move south, he sends famous generals such as Yue Fei and Huo Qubing on a northern expedition to drive back external enemies. Internally, he rectifies the aristocratic clans and consolidates imperial power; externally, he stabilizes the borders in all four directions. Step by step, Ning Fan stabilizes the country and state, governs with diligence, and ultimately creates a prosperous age of a generation, achieving the great enterprise of an eternal emperor.