Nineteen-year-old Erin Ashborn is raised as an ordinary human until her primordial witch blood awakens on the execution pyre. Four supernatural rulers—vampire king Cain, supreme Alpha Rorke, warlock prince Lucien, and fallen angel Azrael—arrive to claim or protect her. Erin learns that she is the sacrifice sustaining the world's seal and that one of the four killed her previous incarnation. Moving through the power struggles of their courts, she investigates the murder and the curse, refuses to remain anyone's pawn, exposes the Hollow King behind the tragedy, and unites the four rulers to destroy the ancient evil before ascending as queen of all four courts.
