Lin Mu travels through time into a chaotic ancient era and becomes a village chief. While escorting impoverished laborers assigned to build an imperial mausoleum, he activates a self-service buffet system. He establishes rules that balance work and rest and guarantee three filling meals a day, treating everyone well. Unexpectedly, the laborers begin competing to outdo one another. Soon, talented individuals and elite soldiers flock to join him, and his group grows stronger by the day. Eventually, everyone rallies behind him to establish the Great Yun Dynasty. Using special items from the system, he cleverly repels his enemies and builds his own empire amid the chaos.