The story begins with preacher and exorcist Reverend Cotton Marcus (Patrick Fabian) who has become disillusioned with the practice of exorcism and has decided he no longer wants to perform. He meets a film crew with director Iris Reisen (Iris Bahr) and camera man Daniel Moskowitx (Adam Grimes) that is interested in documenting his work. He agrees to let them film his very last exorcism, as he claims he is doing it in order to show how the exorcisms are often fake. Marcus states though they are fake, they can be helpful mentally to those that believe in them–though an exorcism in the wrong hands can also be deadly.
Marcus randomly chooses a letter he has been sent by someone beginning for help with an exorcism. It is written by Louis Sweetzer (Louis Herthum) who claims his daughter Nell Sweetzer (Ashley Bell) is possessed. He claims she needs the demons driven out of her as she slaughters the farms animals while possessed. The team hits the road and heads to a middle-of-nowhere town in Louisiana where the family resides. They meet Nell and hear all of the details surrounding her case. Reverend Marcus then shows the film crew how he hides props to help aid in “driving out the demon”. With these special effects the family is convinced the demon has been driven out and the team, satisfied with the results, heads to a hotel.
It is far from over, however, as that same night Nell suddenly appears in the reverend’s hotel room. They decide to take her to a hospital to get her tested for any mental or physical problems, but the doctors are unable to find anything wrong with the girl. Her father takes her home and when the film crew arrives again she has been chained in her room as she has been accused of slicing her brother in the face. There are many disturbing things happening in the house over the course of the next night and day, one of which is drawings made by Nell showing the reverend and the crew killed: the preacher is killed by fire, the director by an axe and the camera man by beheading.
Amidst all the commotion, the hospital calls with startling news, Nell is pregnant. Accusations fly and tempers get heated, and finally Marcus declares the family needs psychotherapy not an exorcism. Before the crew can leave they find Nell on top off her dresser, twisting her body and acting strangely. After a struggle Marcus agrees to do another exorcism, this time in the barn. She soon begins contorting her body in strange angles, even breaking her fingers to show she is possessed. The preacher soon believes he finds holes in her story and after much confrontation finally gets Nell to admit she had sex with a boy she knows, and the guilt and shame are the reasons she has been acting out.
The team, satisfied that they have finally gotten to the bottom of things, leaves the family. On their way back home they stop at a shop and meet the boy Nell claims impregnated her, only to find out that he hardly knows her and is in fact a homosexual, and thus not possibly the father. The crew head back to the Sweetzer home. When they arrive the walls of Nell’s room are covered in demonic images and pentagrams. The family is nowhere in the home, but a fire can be seen in the woods some distance off. The team soon wanders into the woods, desperate for answers, and find a large congregation of occultists. Nell, whom is tied to a table, gives birth to something that doesn’t look human. An occult member takes it and throws it into a raging fire in the center of the meeting.
