A red-hot hidden hero! Who was the mysterious Guardian Angel? He'd succeeded where the FBI had failed, rescuing countless kidnapped children. His closely held hidden identity – as reclusive Nathan Tyler – was the only thing safeguarding his most private secrets. Colby agent Ann Martin had a serial kidnapper on her hands and no viable leads. Except the Guardian Angel. Undisclosed liaisons with the vigilante weren't safe. The man was no saint, but neither was she. And breaking all the rules was only the first step they'd take together...