Ye Chen, a Qingyun Sect disciple whose dantian has been shattered, unexpectedly falls into demonic cultivation yet holds fast to the righteous path in his heart, taking on acts that defy heaven. He carves a path through the divide between good and evil, protects all living beings with his demonic body, and sweeps the monsters of the Three Realms away with his killing intent. The world calls him a demonic fiend, but he insists on wielding the demonic sword to bring order to the world. In the end, he becomes a peerless Demon Lord, ruling the Nine Heavens and Three Realms.