The time has arrived for Cait, her lover dragon Asher, and their friends to face their final battle with Davy and his selfish desire to free himself from his curse, no matter the cost.

Rumors come to them via an acquaintance that the vampyre is on the move, and moving toward the mystical islands of the wizarding family that created the Heart of God boxes. They pursuit their foe only to find themselves embroiled in international conflict and a race toward the islands that involves more than the bloodsucker. Someone else wants to learn the secrets of immortals and their powers, and that someone is just as desperate as Davy to find the answers they seek.

Pitted against foes known and unknown, Cait also struggles with the sliver of immortality she carries with her. Amalthea's powers manifest themselves and complicate matters, leading to a final showdown that will decide not only the fates of Davy and Asher, but her own.