Nightmares are anything but just dreams for Nyx Evergarden. When her power to manipulate the shadows grows too strong, her mother is forced to find a school that can tame the darkness that revels within her daughter. But the school is anything but what she signed up for. She uncovers that there are two parallel planes of existence, one light; one dark. These two planes have been at war for centuries under the public's nose, and Nyx is about to find herself caught in the middle. Everything Nyx thought she knew is shattered within days, reality crumpling like a wet piece of paper in front of her. This new knowledge, and her trembling power, is enough to send universes spiraling.
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.