In a world where the boundary between reality and fantasy fades in unimaginable ways, two brothers, Alecksander and Perccyval, embark on an epic adventure into the depths of Agatha, an ancient city hidden underground. Their mission is to rescue their two sisters, Margaret and the little Chelsea, who have been previously kidnapped, while facing all sorts of adversities that test their courage and fraternal bond. The quest takes them through landscapes that defy imagination, with societies composed of beings who border on the limit of eternal life, and whose gifts are as vast as the mysteries of the world that surrounds them.
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.