The thing he feared most lived inside him… PAX superagent Kieran Holt never wanted to leave his wife, Paige, but when a lab explosion turned him from scientist to experiment, he hid himself on a secret island to effect a reversal. Believing Kieran a traitor, Paige had spent the past two years searching for him–but now she wasn't the only one who'd found him. Pursued by a government agency, Kieran and Paige had one last chance to uncover the truth and save their marriage… But only if they could tame the beast within.