Hardened Pittsburgh homicide detective, Franco Patrese, is a man who has lost his belief in humanity, and the latest serial killer stalking his town on a mission to kill according to the ten commandments isn’t quite restoring his faith. Patrese knows that this kind of vigilante justice is the most dangerous kind, and he's prepared to go into some dark places mentally and physically to catch his killer. Partnered with old timer but experienced detective Mark Beradino, they discover the charred body of the first victime, Michael Redwine, a renowned brain surgeon, found in one of the city's most luxurious apartment blocks. Then Father Kohler, a Catholic bishop, is set alight in the confessional at his Cathedral. But they soon discover that these murders are just the first in a series of increasingly shocking and seemingly unconnected murders. Patrese's investigation uncovers high-class prostitution, medical scams and religious obsession, but what Patrese doesn't realize is how close to the case he really is, how connected they all are, and how it will take a terrible personal betrayal to uncover the truth.