A unit of elite marines known as the Relix are sent to retrieve a highly-trained but deeply troubled soldier who has gone AWOL from an experimental PTSD treatment facility. Arriving in the wilds of the Ozark mountains, the Relix soon discover that there is more to this retrieval than they were told: the so-called facility is a church, and the PTSD treatment is exorcism — an experiment that has gone catastrophically wrong. Inspired by true events.