It's been three years since the events of Past Lies. Amy Devlin, in the last month of her time in Beverly Hills' Cold Case Division, has uncovered a series of murders that may all be the work of one man. Every 10 years, a sinner with a saint's name has been brutally murdered on All Saints Day. With a string of cases spanning 30 years, and another killing set to occur within the month, and a Hollywood screenwriter camped out in her office threatening to uncover the secrets of her last big case, can Amy convince anyone these unsolved crimes are connected? And when she starts digging, will she make herself the next victim?