Chu Jin, an abandoned disciple of the Sword Sect, was mistaken for the reborn demon king by the whole world. He killed the elders of nine sects with one sword and stained the mountain gate with blood. Lin Zhao, the daughter of the master who had personally expelled him from the sect, discovered during the bloody battle that his sword moves had the same source as his late father's remains. Blind harpist Liu Hanyi locked his demon soul with music, law enforcement elder Zhao Tieya hid a blood-stained sword spike, while Pei Wujiu, a remnant of the demon sect, and Bai Suyi, the leader of the alliance, had their own evil intentions, and lured him into the abyss step by step. When he finally awakened the demon king's memory, he realized that he was the blood descendant who was wiped out by the right way back then - and it was him who killed the elders, not him.