Zhao Yi transmigrated to the Great Qin. When he slowly came to, he found himself in prison, due to be executed in three days. With no choice but to save himself, he uncovered the secret behind the Xiongnu's apparent immortality and succeeded in escaping. Li Xin took a liking to him, but in doing so Zhao Yi offended Yan Fei, son of Left General Yan Lei. After a scout was killed, Zhao Yi was ordered to investigate a case involving fire oil. Before he could solve it, a massacre of the Min County magistrate's family and the case of the Hu who would destroy Qin emerged in quick succession. Using the science of a later age, Zhao Yi solved each case one by one.
Many years later, Zhao Yi had become the supreme Human Emperor. Looking back, he saw enemies long dead and mountains of bones behind him.
The waves have swept away countless heroes through the ages.
The peach blossoms remain as they were, and humanity once again stands level with Heaven and Earth.