The path to immortality has been severed on the Shanhai Continent. Humans refine their blood and vital energy, while demons devour the living.
Chu Xinren transmigrates into the body of a good-for-nothing outer disciple of the Heavenly Sword Sect. He learns to turn blood and vital energy into spiritual power and use demonic energy to establish his foundation. He slays fox demons and hunts strange beasts, guarding his Daoist heart with his sword.
Distrusted by his sect, resented by prodigies, and opposed by the demon race, he eventually slays ten thousand demons and breaks the seal, reopening the path to immortality.