Li Hao, the top student in the history department, a college student with an almost obsessive love for the history of Qin, lost consciousness in a car accident on a rainy night. When he woke up again, he found that he was Ying Zheng, a 13-year-old boy who was held hostage in Handan, Zhao State in 247 BC. At this time, "he" had just learned of the death of King Zhuangxiang of Qin, and his situation as a hostage was in a precarious position, and he might become a victim of Zhao's anger at any time.
Relying on his precise memory of historical details, Li Hao (now Ying Zheng) planned and successfully carried out a thrilling escape. With the support of Qin envoys, he narrowly escaped returning to Xianyang. Returning to the Qin Palace, he faced the powerful Lu Buwei, who was said to be his "secondary father" and even his biological father, as well as the intertwined and undercurrents of the clan forces. He knew very well that the only trump card in his hand was the complete "historical script" in his mind.