The third war between gods and demons ended with the defeat of the demons.
The devil had no choice but to run away with everyone. Unfortunately, his most beloved little daughter was hit by the magic of the gods and lost all her magic power.
In order to protect her, the devil sent her to the human world.
When parting, the Demon King transformed Xiu Huan, the most precious demon sword of the demon clan, into a small pendant. He used his own hair that would never break to form a hair ring, passed it through the pendant and wrapped it around her neck.
"I'll come back for you, Chee."