The Qing Leng Immortal Lord, who has the supremacy of reason and a firm Taoist heart, was forced to form a life-and-death contract with the paranoid and gloomy Demon Realm Supreme due to an accident. From then on, the path of immortality and the path of demons, reason and lust, the rules of heaven and personal emotions collided fiercely, launching a dangerous entanglement across the three realms.