This story is about the only Demon/Human hybrid in existence, Fane. Demons are not allowed to mate with humans because everyone has a mate that is of their own species. Fane's mother, Ellen, was the only person who didn't have a destined mate and could mate with anyone of her choosing. That means, no matter what species she chooses, she could have their children without dying in the process. She had made the mistake of mating with a dangerous demon and had to hide the child before being taken away, leading to Fane's adventure into the underworld.