'Gruesome, seductive and creepily credible' The Times 'I HAVE SINNED' The words are scrawled in blood at the most shocking murder scene Forensic Pathologist Maura Isles and Detective Jane Rizzoli have ever witnessed. The victim, a young woman, has been entirely drained of blood and horrifically dismembered. When there's a second murder, the police uncover a link to a secret society known as the Mephisto Club. Their mission is a terrifying one - to find the true source of evil on earth. But has evil already found them?