On Friday the 13th, a teen obsessed with Satan and serial killers terrorizes a small Texas town. Survivors fight to stay alive as police race to stop him before dawn during a night-long rampage that leaves the town forever changed and scarred.

On a dark and stormy night, police find a family dead in their mansion. A horror film flickers. A bloody mask lies nearby. And a letter to the victim’s mother — the voice of the demon in "The Exorcist" — hints at something darker than murder-suicide.