College student Qin Mu accidentally traveled to the Qin Kingdom and became Ying Zheng's younger brother. He faced the remnants of the Six Kingdoms and hidden dangers in the court. Accidentally obtained the "Industrial Map" system, which can make primary equipment and unlock new technologies. With modern knowledge and systematic assistance, he proposed a salt and iron monopoly, established an imperial college, established an army, and improved many things. Join forces with Ying Zheng to promote reforms and suppress conservatives, forming a sharp contrast with the old forces. In the end, he helped the First Emperor unify the world, create a prosperous Qin Dynasty with economic prosperity and cultural integration, and return to modernity after completing his historical mission.