Zhang Shi, a graduate of the Department of Modern History, accidentally traveled through the troubled times of the Central Plains in the 12th year of Sui Dynasty. At this time, Yang Guang's three expeditions to Goguryeo failed miserably, the people were in dire straits, bandits were rampant, and the prelude to the separatist rule among the heroes had begun. His soul traveled to a low-class refugee who was on the verge of starving to death. Zhang Shi was equipped with modern historical knowledge and survival skills. Starting with a bowl of wild vegetable porridge and a hatchet, he struggled to survive in a desperate situation where starvation was everywhere. He gathered the displaced people, used simple traps to resist banditry, united people with fair regulations, and used historical predictions to avoid disasters. From self-protection of rural villages, to outsmarting the county town to establish a foundation, to training the army and recruiting talented people, Zhang Shi broke through the thorns in the sea of blood and corpses, worked step by step in the whirlpool of power, and finally transformed from an unknown refugee to an emperor who aspired to dominate the world, writing a legend of the counterattack of a low-level man.