Jayn? Heller has discovered the source of her uncanny powers: something else is living inside her body. She's possessed. Of all her companions, she can only bring herself to confide in Ex, the former priest. They seek help from his old teacher and the circle of friends he left behind, hoping to cleanse Jayn? before the parasite in her becomes too powerful. Ex's history and a new enemy combine to leave Jayn? alone and on the run. Her friends, thinking that the rider with her has taken the reins, try to hunt her down, unaware of the danger they're putting her in. Jayn? must defeat the weight of the past and the murderous intent of another rider, and her only allies are a rogue vampire she once helped free and the nameless thing hiding inside her skin.
For the first time in forever, Jayn? Heller's life is making sense. Even if she routinely risks her life to destroy demonic parasites that prey on mortals, she now has friends, colleagues, a trusted lover, and newfound confidence in the mission she inherited from her wealthy, mysterious uncle. Her next job might just rob her of all of them. At Grace Memorial Hospital in Chicago, something is stirring. Patients are going AWOL and research subjects share the same sinister dreams. Half a century ago, something was buried under Grace in a terrible ritual, and it's straining to be free. Jayn? is primed to take on whatever's about to be let loose. Yet the greatest danger now may not be the huge, unseen force lurking below, but the evil that has been hiding in plain sight all along — taking her ever closer to losing her body, her mind, and her soul. . . .
