It is based on Du Huan's "Jing Xing Ji" of the Tang Dynasty. In the tenth year of Tianbao, the Anxi Army of the Tang Dynasty and the black-clothed Dashi fought against Talos. The 30,000 Tang army was defeated, and Du Huan, the secretary of the army, was captured. This scholar, who was born in the Du family in Jingzhao and was full of knowledge but had no power to tie a chicken, saved his life with a fluent Persian sentence when the scimitar was placed on his neck - and then embarked on an eleven-year journey back home.
From the papermaking workshop in Samarkand to the Caliphate's court in Baghdad, from the tit-for-tat confrontation with the Persian royal doctor at the academic gathering to the power play with the Barmak family under the Round City, Du Huan relied on the wisdom and unyielding resilience of the Oriental to step by step from a prisoner of war to become a technological consultant to the Abbasid dynasty. However, the chessboard of fate is far more complicated than he imagined - an Eastern Roman spy named Michael who calls himself the "Messenger", a woman whose life experience is a mystery and wanders between empires, Maria, and a power game spanning two empires draws him into a deeper vortex.
