Shen Guyun, who was ridiculed by the whole world as a useless master, hid his sword for ten years, and once he unsheathed it, he killed all the famous swordsmen in the world. Next to him are Liu Wuyi, a mysterious woman disguised as a killer, and Qin Tiegu, the naive protector who firmly believes that he is not a useless person. When the Blood Phoenix Pavilion conspiracy emerged, his former mentor Mo Qianfeng fell into a curse, and the crazy words of the intelligence dealer Bai Wuchen turned out to be the key code. Only then did Shen Guyun realize that the remaining sword in his hand was not implicated in the survival of the sect, but the truth about the imperial power that was erased three hundred years ago.