Hazel Sinnett is alone and half convinced the events of the year before—the immortality, Beecham’s vial—were a figment of her imagination. She doesn’t even know if Jack is alive or dead. All she can really do now is treat patients and maintain Hawthornden Castle as it starts to decay around her. When saving a life leads to her arrest, Hazel seems doomed to rot in prison until a message intervenes: Hazel has been specifically requested to be the personal physician of Princess Charlotte, the sickly granddaughter of King George III. Soon Hazel is dragged into the glamour and romance of a court where everyone has something to hide, especially the enigmatic, brilliant members of a social club known as the Companions to the Death.