When the body of young novice Sister Camille is found garroted in St. Marguerite's cathedral, New Orleans Detectives Bentz and Montoya are called in. Bentz is sure Father O'Toole is their man. But there are other suspects, too, including a ruthless murderer believed to have died years ago.

When detective Regan Pescoli drives to Sheriff Dan Grayson's house to present her resignation, she's not expecting to find him shot and bleeding out on the frozen ground. With Grayson barely clinging to life and the entire police department in shock, Pescoli feels compelled to stay on the force until the case is solved. She and detective Selena Alvarez work to whittle down the list of suspects, but the case becomes more personal and more dangerous...