In 210 BC, the Qin Empire was at its peak, but its first emperor, Ying Zheng, was already terminally ill.
Chen Mo, a history student, accidentally traveled through time and became a ninth-grade official in the Qin Dynasty. Faced with the fate of the First Emperor's imminent death and the death of the Second Emperor of Qin, he made a crazy decision - to use the "seven-star lamp to extend life" method to exchange his own lifespan for the First Emperor's twelve years of life.
The price is: a twenty-three-year-old young man turns into a fifty-nine-year-old man overnight.
But Ying Zheng saw through his origin at a glance. Because before him, countless travelers had come to this emperor - some advised him to abolish the Great Wall, some taught him pinyin, and some told him that the earth was round. Each of them said that they were here to help, but they all refused to bow to this eternal emperor.
Only Chen Mo knelt down and called "Chen".
The First Emperor said: I believe in you.
Twelve years is enough time for an emperor to do many things and for an empire to make many mistakes. Chen Mo will use these twelve years to rewrite the fate of the Qin Dynasty and lay the foundation for Chinese civilization for all generations. But what he faced was the deep-rooted strict laws, the eager remnants of the Six Kingdoms, the insidious and cunning eunuch Zhao Gao, and all the long-standing problems of a huge empire that were difficult to recover from.
What's more dangerous is that his life is passing by day by day.
It's a race against time. A time traveler, an emperor for eternity, a twelve-year agreement between the king and his subjects. As the wheel of history rolls forward, can they turn things around and let the flag of Qin fly forever on this land?