Since the creation of the world by Pangu, the world has been divided into the upper realm and the lower realm.
The upper world is divided into four major clans, the gods, demons, monsters and dragons.
The lower realm is divided into four major kingdoms, Jurong Kingdom, Youxing Kingdom, Lisi Kingdom and Xifeng Kingdom.
During the Dongyuan period, demons and ghosts began to appear in groups in the lower realm, making the people in the lower realm miserable.
The prince of the demon world and the demon world was sent to the lower world to find the reason for the proliferation of demons and ghosts.
The demon world and the demon world were suspicious of each other at first, but as they explored deeper and deeper, they discovered that the truth of the matter was not that simple.
Concept: What is the boundary between black and white?