In Baton Rouge, Louisiana, the evangelical Reverend Cotton Marcus was raised by his father to be a preacher. He agrees that the filmmaker Iris Reisen and the cameraman Daniel Moskowitz make a documentary about his life. Cotton tells that when his wife Shanna Marcus had troubles in the delivery of their son Justin, he prioritized the doctor help to God and since then he questions his faith. Further, he tells that exorcisms are frauds but the results are good for the believers because they believe...

Souder, a homicide detective in a small Texan town, and his partner, transplanted New York City cop Detective Heigh, track a sadistic serial killer dumping his victims' mutilated bodies in a nearby marsh locals call 'The Killing Fields'. Though the swampland crime scenes are outside their jurisdiction, Detective Heigh is unable to turn his back on solving the gruesome murders. Despite his partner's warnings, he sets out to investigate the crimes. Before long, the killer changes the game and...