The story takes place in the Qin Dynasty after Qin Shi Huang unified the six kingdoms. The protagonist travels to 210 BC, just before the death of Qin Shi Huang. The story mainly takes place in Xianyang Palace and its surrounding areas, which was the political center of the Qin Dynasty and the core area of the power struggle.
The protagonist travels through time and becomes Hu Hai, the second emperor of Qin, and obtains the imperial system. In the power vacuum period after the death of Qin Shihuang, he needs to face the threats of Zhao Gao, Li Si and other powerful ministers, as well as the eager eyes of the remnants of the Six Kingdoms.