The Dark Alliance in the West is composed of vampires, werewolves, and demons. They took advantage of the war to enter China, intending to use China, which is beyond the reach of the Holy See, as a dark colony.
The Spirit Clan is a family unknown to the world. It is the descendant of a god who was nostalgic for the mortal world in ancient times and a human being. It possesses the spiritual power left by the god and has been secretly controlling the monsters and demons in the East.
The invasion of the Dark Alliance broke the balance between spirits, demons and demons that had been maintained for thousands of years, and a war between spirits and demons quietly began.