When the body of young novice Sister Camille is found garroted in St. Marguerite's cathedral, detectives Bentz and Montoy are called in. The deeper the investigation goes, the eerier it gets. More nuns are being brutally slaughtered by someone who seems to know their darkest secrets. Though Bentz is sure Father Frank is their man, there are other suspects, including a killer thought to be dead. Has the monstrous Father John returned? Or is the truth even more twisted and terrifying?