High-powered producer Dylan "Oz" Oswin is so desperate to find his kidnapped son that he's willing to do or believe anything, including follow a mysterious tip that leads him to a missing former child singing sensation.

Now a reclusive children's book author, Pippa Malcolm James—formerly known as Syrene—has been hiding her identity for years, vowing never to unleash her lethal siren's voice again. When Oz shows up on her doorstep, he endangers her privacy and her world—but how can she resist his heartfelt plea to find his child? Oz will stop at nothing to make Pippa break her vow. He is the proverbial immovable object, but Pippa's charm is irresistible. Can he believe her beautiful song will kill—when he's convinced her voice is the key to his son's recovery? Or could her song be the key to healing their wounded hearts?