While his wife is recovering from birthing complications, Peter Decker of the LAPD (False Prophet, etc.)--along with his partner Marge and his teenage daughter, Cindy, from his first marriage--investigate the kidnapping of baby Rodriguez from the hospital nursery. Two nurses are also missing--one turns up murdered at the bottom of a cliff--and a former staff nurse, a 300- pounder with forged credentials, is now a sleek bodybuilder who hears voices telling her to kill. Decker, Marge, and Cindy toss around possible motives and--thanks to clues provided by the ramblings of an old woman and the confession of a scheming male RN- -they piece together the tale of a seriously warped little girl who grew up to confront the woman who had an affair with her daddy--a woman now so repentant that she swears she is the murderer/kidnapper. Nice family scenes for Jewish convert Decker and his orthodox in-laws, and Cindy is the most appealing--and overeager--teenage detective since Nancy Drew. But Kellerman's plotting still veers into melodrama, undercutting her story's plausibility.