Fang Xian, a top student in the history department, and his sister-in-law Gu Ying accidentally traveled to the Qin State at the end of the Warring States Period.
The two began to survive on the streets, and relied on modern knowledge to break into the center of power.
They wanted to live a stable life, but they found that history always went wrong, and even time travel itself hid big secrets.
In the Qin Dynasty full of conspiracies, the two supported each other and eventually counterattacked and became key figures affecting the fate of Qin.
Part of the plot of the novel is fictitious.