Eighteen years ago, the benevolent young lord of Ningdu City was brutally murdered by unknown assailants while returning home. His guards Zelan and Bai Qing, along with his son Mo Jing, vanished without a trace, leaving the case unsolved in the martial world. Eighteen years later, a notice posted by the gravely ill old city lord seeking his lost grandson shattered the desert's tranquility.

During the Republic of China, warlords fought each other. Imperialist powers supported warlords to fight proxy wars. In this way, they gained the most benefits. Zhang Qiufeng and Zhang Qiuyun became the tools of the East and West respectively. In the process of assassinating Governor Yu, they gradually understood their own life experience and the cause of their father's death. Under the hatred of the country and family, the two brothers fought a desperate battle with the imperialist powers.