Plane X

Once there had been three separate dimensional fields called Planes. Each plane was inhibited by different life forms. Plane A had Humans. Plane B had supernatural humans. And Plane C had demons and other terrifying creatures you could only see in your nightmares. Usually, the Planes remained apart, but one day, the planes had started merging and had become one super plane called Plane X. After they were sure Plane X was stable and that the planes wouldn't separate again, they had formed groups. These groups excluded humans, and demons (who learned to form of humans) and was ran by the Dawn. 500 years later, in the year 2018, is where the story starts.