In the later period of Qin's unification of the world, Xuan Gui (codenamed "Jingzhe"), the top secret agent of Black Ice Platform, enforced the iron laws of the empire with a ruthless blade. However, when he was suppressing the anti-Qin organization "Xinghuo", he had many confrontations with Bai Yin, a survivor of the Zhao Kingdom, and Su Wen, a disciple of the Mohist family. From the Bolangsha assassination to the sudden change in the sand dunes, he witnessed the darkness of the court and the suffering of the people, and his faith gradually collapsed. When the First Emperor of Qin died and Zhao Gao was in chaos, Xuan Gui finally broke away from his old masters and stood side by side with his former mortal enemies Bai Yin and Su Wen. In the chaos of the late Qin Dynasty, he found light in the darkness and new life in the choices, and together witnessed the dusk of a dynasty and the birth of a new era.
