On the night when he was expelled from his master's school, Xiao Jin cut off the head of his framer and walked out of Cangyun Mountain Gate on a bloody road. He practiced forbidden magic, swallowed demon bones, and vowed to nail the heads of righteous hypocrites to the altar one by one. And Yun Zhao, the junior sister who had wiped his sword for him, was weaving a bigger net deep in the sect with her gentle manner. The secret of Bai Ember Rock, Shen Broken Throat's knife, Liu Wushuang's poison, Qi Wujiu's confession - each of them is a trembling sound on the blade. When Cangyun is destroyed, who is the real devil?