When Thea Taylor is seven years old she finds a diary on the floor of a bookstore. When she writes a letter to her future self she ends up getting a reply. And it's only the beginning....
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.