Set in the small coastal town of Verrien, Maine, four friends are drawn to the old forest they grew up in and the mysterious girl living within it. There's Julian, the new kid with an author for a father and more of a history with this place than he knows; Finley, the brave fireball of a boy who sees himself doing nothing less than changing the world; his quiet little sister Maeve, who writes poetry and fears all things vast, and Elliot, who has been watching the girl from the forest for so long that she is a part of him, even when to the others she may not exist. But the forest, which seems at first whimsical and inviting, is taking pieces of them all, and they don't know if they can make it out whole, or if they want to.
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.