Ciel Sans-Lune doesn't have magic despite coming from one go the most powerful families in the land, the Sans-Lune have ruled Yelda for generations and only now is there something going wrong.
In the epic conclusion to the Devil's Deal series, Freya has one final chance to discover the full potential of her own power, and to use it to restore balance in the universe - once and for all. After the destruction caused by Roisin, Ferya and Torix come to terms with their losses and mistakes... And prepare for a final battle that will change everything.