On her sixteenth birthday, Sarina Slyfoot will be sacrificed to the Jack 'O'Skins, the terrifying monster who rules within the Veil, a barrier of mist that has imprisoned the elves of the Mire for over a thousand years.
Rules are rules after all. The elves hate humans and Sarina is no exception.
Suddenly, Sarina is made an offer by Alaina Grendulf, defacto ruler of the Mire, who will allow Sarina to remain in the Mire for one teeny-tiny favor: help Alaina destroy the Veil and Jack forever.
Seems like an offer Sarina can't refuse, except Alaina is hiding a vital part of her plan, one that carries a heavy price. It'll take all of Sarina's cunning to solve the mystery of the Mist before she becomes its next victim...
Welcome to the Mire, a land of magic and mayhem, where secrets never die, they only sleep beneath the blood-soaked soil of this enchanted swampland.
And where the real monsters aren't the ones in the Mist.
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.