Modern archaeologist Qi Beichen triggered the mysterious jade pendant while excavating the Qin Mausoleum, and traveled through time to become Qi Mo, the general and concubine of the Qin Dynasty. When the First Emperor passed away and undercurrents were surging in the world, he relied on his historical knowledge to save Meng Tian's son Meng Yan in Zhao Gao's "turning a deer into a horse" incident, but was forced to be involved in Hu Hai's vortex of seizing the rightful son. As the plot progresses, Qi Mo forms an alliance with Yun Mei, a female disciple of the Yin Yang family, and Jing Yuan, a ranger of the Mohist family, and discovers that the jade pendant is actually the "Key to the One" that connects time and space. When Xiang Yu invaded Xianyang, Qi Mo faced a choice: follow history and burn Epang Palace, or use modern knowledge to save the classics? In the end, he chose the third path - to establish "Tiangong Academy" to preserve the spark of civilization. The story ends in a modern museum in parallel time and space. There is an extra Chu slip recording the deeds of "Master Mo" in the display case, and the white-haired Qi Beichen is smiling knowingly at the jade pendant.
