The sparkling marble city of Maris is under threat.
Warriors from far away lands have returned to conquer and pilage its riches after breaking a long truce of peace and prosperity.
Willow, a sailors daughter, is thrust into a war she never could have dreamed of, fighting for her home, her life, the people she has befriended and the family she loves.
Is there a way to save Maris from failing the assault and crumbling into the sea? Or is Willow's home to be lost to the enemy forever?
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.