When Elaina Stevens is viciously attacked by a rogue vampire, she survives only because another vampire intervenes. Rafe is a Night Dweller, sworn to protect humans from the ravages of his own kind, feared creatures known as Dark Wanderers. To protect Elaina, Rafe puts his mark on her and in the process brands her very soul. But Rafe's vows forbid him to touch her again…no matter how much she wants him to.

Then Elaina discovers Thorn, the vampire who attacked her, wishes to repent for his past sins. But the process of bringing a Dark Wanderer back to the light requires a human host—someone willing to be filled with the essence of both vampires at the same time.

To be with the man she loves, Elaina is willing to do almost anything — even act as the host for her most feared enemy. She agrees to accept both Rafe and Thorn in a single night as the mysterious act of sex magick draws the rogue vampire from darkness into light, not knowing what will happen between vampires and human when the Ceremony of Three is over.