In the middle of the 7th century AD, at the end of the Zhenguan era of the Tang Dynasty, Chang'an City seemed prosperous on the surface, but in fact there was an undercurrent. The envoy from the Western Regions was mysteriously killed, and a map of the Silk Road with hidden conspiracy disappeared. Pei Yuan, a young translator whose life experience remains a mystery, is forced to get involved in this power game that spans the Central Plains and the Western Regions.
He was forced to join forces with Li Qinglan, a female official who cared about the righteousness of his family and country, and Ashina Sheer, a Turkic prince who was both an enemy and a friend, and struggled to survive in the turbulent court and the murderous Silk Road. From the secrets of the palace in Chang'an to the lonely smoke in the desert of Dunhuang, from the ruins of the ancient country in Gaochang to the assassination nests in Persia, they gradually uncovered a huge conspiracy that could subvert the structure of the Tang Dynasty and the Western Regions.
In this chess game of power, everyone is a pawn or a possible player. Loyalty and betrayal, civilization and barbarism, love and ambition are intertwined to compose a soul-stirring epic legend.