The universe depends on a queen to keep its planets in balance, but her power is failing and a new queen must be found. Angelique Limoges sees something no one around her can see — a figure riding a horse across the sky — marking her as a chosen candidate for the throne. She is not alone: Rosalia De Catargena is the other candidate. Both young women are summoned to the Holy Land where the current Queen resides, and their journey and rivalry begin.