New witch and midwife Cassie Strega helped a human mother through the tumultuous birth of the queen of the demons, and now Cassie and the baby have been kidnapped by one of the demon princes fighting each other to lay claim to their new queen. Cassie hopes she can appeal to the human side of the child in order to save humanity, but as the child feeds upon her soul, Cassie must also battle the four demon-prince-uncles who intend for the infant to fulfill her dark destiny.

The love of Cassie's life, the sultry heir to the Fae kingdom, Orion, is still searching for the Fae queen he's been tasked to find, but he is also desperate to save Cassie from his archenemies. He is torn between his heart and his duty, but if he doesn't save Cassie by Beltane, the blood bond that connects Cassie to Orion will forever be severed and she will be marked as an enemy—one he is sworn by oath to kill.

Fate was cruel when it linked Cassie and Orion together. Their attraction to each other is undeniable, their love assured, but these lovers are doomed by a curse that threatens to keep them apart. Every touch during every shared dream, every kiss during every cherished moment together is driving them closer to what will either be a victory of humanity or an end no mortal will be able to survive. Will love truly conquer all or will it destroy them all?