Astronaut Xiang Shaolong encountered a black hole in the "Nebula" accident and traveled back to China during the Warring States Period more than 2,000 years ago, to Handan, Zhao State, three years before Qin King Ying Zheng ascended the throne. Xiang Shaolong was stranded alone in Handan. In order to return to the future, he decided to find Ying Zheng at all costs and help him build a great career. From then on, he began his journey to find Qin Shihuang. On the way, he was not only involved in the proton return to Qin and the conspiracy of powerful officials of various countries, but also met the ancient girl Xingyun, writing a legend in the Warring States Period.