Ten years ago, Qin Cangming, the greatest swordsman under heaven, showed mercy and let his junior brother Xie Yunque go, despite his heinous crime of murdering their master. Ten years later, Xie Yunque leads a million cavalrymen of the Xuanming Dynasty south, bathing the Central Plains in blood. As Qin Cangming gazes upon the corpses of his closest friend and the bones of the people, regret cuts to the core. He takes up the blade he abandoned ten years ago and rides alone north, determined to crush the dynasty built upon a mountain of bones. The intelligence queen Liu Wushuang secretly weaves her web, while his mad younger sworn brother Lu Qianshan hides old feelings behind his blade. And the ambitions of strategist Bai Wuji turn this revenge into a game played by three sides. This blade will cut down a dynasty, and the undeserved mercy he once showed.
