At seven years old, Bill Horton watched in horror as a serial killer murdered his mother. Known as The Evangelist, he places a bible next to her body and quotes scripture as he leaves Bill alone and destroyed. Thirty years later, Bill has grown up and appears to be a model citizen, spending his days cleaning his house and baking. He has, however, picked up the mantle of The Evangelist, killing those who he finds wicked and evil and leaving a bible by their bodies. Bill only opens up to Dr. Laura Cooper, a psychiatrist, who discovers Bill's dark secret. She contacts young Detective Edward Legros who is working on the case with his cynical, veteran partner, Detective John Vance. But what Vance knows about the original Evangelist will lead to a bloody showdown.