Mate to the lord of the underworld.
Cassie is one of the many million normal teenagers in the world but with a very big difference. Deep inside of her there is a knot which forever binds her to the biggest and most powerful source of evil mankind has ever imagined; the lord of the underworld. She has no clue in what her destiny entitles. She will come face to face with all the creatures from myths, legends and fairy tales. She will need to find the strength to overcome all of them, but can she escape from the devil himself?