Seventeen-year-old Pierce is still very much alive, but she's in the place where most everyone else isn't. She's been taken by John Hayden, who may or may not be the love of her life, to the Underworld, the place between heaven and hell where he is the guardian of the dead who pass through on their way to their next destination. John's taken her there ostensibly to protect her from the Furies, who seek vengeance on him, but he may have reasons beyond that as well. When Pierce finds out that while she may be safe with John, those that she loves at home most certainly are not. Will she be able to convince him to release her in order to save the life of someone she cares about, or has she already committed herself to the Underworld for good?