The Mephisto Club

A young woman's brutal murder, marked by a bloody Latin inscription, plunges medical examiner Maura Isles and Detective Jane Rizzoli into a dark investigation. The victim is linked to a controversial psychiatrist and a secretive club obsessed with the nature of evil. As the club members grapple with their theories about Satan's existence, a killer stalks the city, blurring the lines between their studies and a terrifying reality.