On the grounds of Washington's National Cathedral, during a fierce midnight windstorm, the police find a young woman with her throat shredded by human teeth. Soon, other victims follow. When hematologist Dr. Katherine O'Keefe examines traces of the killer's own blood left on the grisly wounds, she makes a strange The cells refuse to die. Even more troubling, the evidence mirrors the symptoms of one of her patients, a young girl desperately ill with what seems to be leukemia, but isn't.