George Wilson, M.D., a radiology resident in Los Angeles, is about to enter a profession on the brink of an enormous paradigm shift, foreshadowing a vastly different role for doctors everywhere. A new smartphone app is being developed that is far more than a mere reference tool, rather it is a fully customizable personal physician capable of diagnosing and treating patients more efficiently than the real thing. It is called iDoc. George's initial collision with this incredible innovation is devastating. He awakens one morning to find his fiancee dead in bed alongside him, not long after she participated in an iDoc beta test. Then several of his patients die after undergoing imaging procedures. All of them had been part of the same beta test. Is it possible that iDoc is being subverted by hackers — and that the US government is involved in a cover-up? Despite threats to both his career and his freedom, George relentlessly seeks the truth, knowing that if he's right, the consequences could be lethal.

Through a crisis of medical malpractice emerges evidence of how the medical profession itself is being harmfully transformed by the intrusion of powerful business interests. Not least is the growing prevalence of 'Concierge Medicine' where public-service doctors will take on private patients for a fee. In this thrilling story, which again features Dr Laurie Montgomery and Dr Jack Stapleton (whose long-term professional relationship here takes on a new twist), Robin Cook continues to enthrall us with his deep personal insight into contemporary medicine but also provides readers with the biggest surprise ending found in any of his many bestselling novels.