Calista and Plato Marley are a pair of married doctors turned sleuths. Calista is a professor of anatomy, deputy coroner for the county and a practicing pathologist, while Plato is a family practitioner specializing in geriatrics. When fellow doctors start dying mysteriously, Calista and Plato risk their careers and their lives to uncover the cause, means, motive --and perpetrator of what looks like an epidemic of foul play.