The murder of Sofia Suarez is both gruesome and seemingly senseless. Why would anyone target a respected nurse who was well-liked by her friends and her neighbours? As Detective Jane Rizzoli and Forensic Pathologist Maura Isles investigate the baffling case, they discover that Sofia was guarding a dangerous secret -- a secret that may have led the killer straight to her door. Meanwhile, Jane's watchful mother Angela Rizzoli is conducting an investigation of her own.