In ancient times, there was a war between humans and demons, the world became a purgatory, and the nation was about to be annihilated. Xuanyuanjue, the son of the human king, took the demon-suppressing knife given by Nuwa and fought with the demon king on the battlefield for life and death. The battle was fierce, and the two fought for hundreds of rounds. When the demon king was about to win, he died under the demon sword in order to protect Xuanyuanjue. The human race was victorious, but Xuanyuan Jing couldn't be happy. Looking at the dissipated Demon Lord, he finally couldn't help shouting: "No, Baili." In order to find a way to reborn the Demon Lord, he did not hesitate to sever the father-son relationship with his father and focus on cultivation. After becoming a god, he finally found a way to be reborn, but he had to pay the price. He became a demon with a single thought, going around in circles. Tens of thousands of years passed, and finally became a ghost judge in the underworld, just because he wanted to see his beloved boy in the underworld. The devil reincarnated and became an adult with one thought. After many lives, under the design of the devil, his devil consciousness was opened in this modern life and he remembered his past and present lives. The two met again, setting off another bloody storm, and another battle between man and devil was inevitable.