Deciding on her thirty-ninth birthday that a baby is the best present she could give herself, single Manhattan public relations executive Nina Kitchener makes an appointment to undergo artificial insemination at the Human Fertility Institute. Nine months later, the nightmare begins. Just hours after she gives birth, someone kidnaps her infant son from the nursery. The police aren’t helping, the fertility institute has shut down, and Nina believes that the only way to find her baby is to learn the identity of the sperm donor.

Nina’s hunt for answers leads her to the Bahamas and the rich, reclusive Standish family who funded the institute. But Nina isn’t the only one investigating them. Joining forces with divorced ex–Navy SEAL and deep-sea diver Nate Matthias, Nina is unprepared for the horrors they uncover. A long-buried secret that dates back to Nazi survivors of World War II is still deadly enough to threaten Nina’s life, her baby’s, and that of the mysterious man who’s protecting her.