Human beings have the blood of the ancient demon gods, and the demon sect is to cultivate this trace of blood to become a demon god. Jiao Fei, the son of a commoner, met a sloppy Taoist, and the sloppy Taoist was the head teacher of the northern demon sect. Jiao Fei passed the test of the Taoist and worshiped. As a master, he has learned a skill - Black Water True Law, which is the supreme skill to discover the ancient blood. Let's see how the protagonist restores his true self and cultivates into an ancient demon god!'