Young Amanda has always had fond memories of her "Uncle Merlin", Marius Bradford. However, no one else in her family has ever known Marius the same way she has, so they have no idea of his "magic powers". However, when the girl with her younger brother and cousin come to visit Marius, they stumble upon a strange shoebox. Amanda is thrilled when Marius tells the youngsters that the box is in fact, magic. He begins to share the stories of the various memories locked within. But Marius has an ulterior motive behind his stories, and soon the children learn that adventures have danger, and that not all magic is good.
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.