In the delectable fifth installment of the bestselling adventures of Isabel Dalhousie, our cherished inquisitive heroine returns to investigate a medical mystery. A doctor's career has been ruined by allegations of medical fraud and Isabel cannot ignore what may be a miscarriage of justice. Besides, Isabel's insatiable interest is piqued and she finds herself asking questions. Would a respected doctor make such a grave mistake? If not, what explains the death of the patient? Clearly, an investigation is in order. . . . .