Twenty-five years later, the disappearance of the demon ancestor caused a struggle for power in the demon world. Dongfang Lan, the descendant of Shangguan Tianhen, entered the mortal world for the first time. Shangguan Tianhen's son, Shangguan Yewu, ate the demon ancestor's demon bead. By chance, he met Han Runian, the daughter of the prime minister of the human world...