A modern history enthusiast travels through time to the Great Qin, becoming Prince Gao, whom Ying Zheng demotes to a commoner. Awakening the daily check-in system, he amasses his first pot of gold through the refined salt purification method and rises step by step. He manufactures paper, improves military equipment, befriends Fusu, matches wits and courage with Zhao Gao, and foils the conspiracy of the Shaqiu incident. After Ancestral Dragon passes away, he assists Fusu in ascending the throne, repels the Xiongnu in the north, pacifies the remnants of the six states, and implements lenient political reform systems. Having weathered numerous storms, he neutralizes court framing, gives up the opportunity to return to modern times, stays in the Great Qin, and joins hands with his elder brother to create a prosperous era, completely reversing the tragic fate of the Great Qin perishing in the second generation.