Zhao Yu, a top student in the Department of History in the 21st century, is obsessed with Qin and Han bamboo slip documents and archaeological reports, and is especially good at analyzing loopholes in the political system of the Qin Dynasty. While participating in an experiment to repair bamboo slips unearthed from the Mausoleum of the First Emperor of Qin, a short circuit in the instrument triggered a space-time anomaly, causing his consciousness to travel back to 210 BC and possess the body of the young master Hu Hai who accompanied the First Emperor on his eastward tour. At this time, the original owner Hu Haigang fell from a horse and was in coma for three days due to alcoholism, which provided a perfect cover for Zhao Yu's replacement.
On his fifth eastward tour, Qin Shihuang arrived at the Sand Dune Platform (now Guangzong, Hebei Province). He was seriously ill and bedridden, and his entourage was strictly controlled. Zhao Gao, the commander of the CRRC Mansion, took advantage of his ability to control the seal and secretly colluded with Prime Minister Li Si in an attempt to tamper with the imperial edict of "passing the throne to Fusu". The old aristocrats of the six kingdoms of Guandong are lurking among the people, using "Restore Chu" and "Xing Qi" as secret codes to communicate with the forces; the corvee recruitment in Guanzhong has exceeded the limit, and there are undercurrents of rumors of prisoner riots in Lishan; the 300,000 Northern Army led by Meng Tian and Fusu guard Shangjun, forming a subtle check and balance with the Xianyang center.
On the premise of saving his own life, he disintegrated Zhao Gao's conspiracy to usurp power, corrected the shortcomings of the Qin Dynasty's urgent government, extended the life of the empire through institutional innovation and improvement of people's livelihood, and finally achieved the historical reversal from "the king of subjugation" to "the master of resurgence" in the name of "Qin Taizong".
