In 2006, an apparent burglary occurs at the home of Kristi (
Sprague Grayden) and Dan Rey (Brian Boland). Every room is ransacked except for that of their infant son Hunter. The only thing stolen is a necklace that Kristi's sister, Katie (
Katie Featherston), had given to her. Following the incident, Dan installs a number of security cameras throughout the house.
Kristi and Ali (Dan's daughter from a previous marriage) start to hear noises and see items fall or move on their own in the days ahead. Martine (Vivis Cortez), the family housekeeper and nanny, feels increasingly nervous and attempts to cleanse the house of "evil spirits." Dan is uncomfortable with these beliefs and actions and fires her after catching her burning sage. Kristi talks to Katie about the events in the home, and reveals that the girls were tormented by a demon or unknown spirit when they were children, but Katie cuts off the conversation saying it's better not to discuss such things.
Ali and her boyfriend Brad conduct a
Ouija board session while Ali's parents are gone, and while they joke around with it the board spells "Hunt" before the footage is cut off. After the footage is cut off, the security camera footage shows Ali asleep on the couch. She is awakened by a loud noise and she starts to go upstairs until she hears loud knocking on the front door. Ali opens the door, walks out and the door violently slams behind her. Later that evening security cameras capture footage of Hunter being pulled out of his crib. When Kristi and Dan come back home, Hunter is back in his crib and Ali comes from the front door. She starts to explain what happened until her dad yelled at her and ordered her to not talk about the happenings in the house.
Meanwhile, Ali (
Molly Ephraim) begins investigating the mysterious happenings in the house. She reads online that a human can make a deal with a demon for wealth or power by forfeiting the life of a firstborn son. She realizes that until Hunter, there had not been a male child born in Kristi and Katie's family since the time of their great-great grandmother. Ali concludes that perhaps a demon is tormenting the family in order to claim the boy for its own.
One night, the family's loyal dog Abby is attacked and pulled violently off camera by unseen forces, and apparently suffers a seizure. Panicking, Dan and Ali take the dog to the vet, leaving Kristi alone with Hunter. While checking on the baby later that night, she notices a light in his bedroom flickers off. As she turns the light back on, she is dragged by an unseen force out of the room and halfway down the stairs before she is released. Kristi frantically runs upstairs into Hunter's room but is once again violently dragged downstairs, this time all the way into the basement, where security footage indicates she remains for over an hour. Eventually the basement door is seen opening and a seemingly possessed Kristi walks out of the basement and through the living room.
The following day a frazzled Dan rushes out to an important work meeting, leaving Ali at home with Kristi, who will not get out of bed. As Ali hears faint knocking sounds on the basement door, she notices that the inside of the door to the basement is covered in scratches. She also sees a word scratched into the door (not recognizing the word as "Meus", Latin for "Mine"). After being drawn upstairs by strange noises, Ali finds Kristi in Hunter's room. Ali frantically calls her father, begging him to come home to deal with Kristi. Ali goes upstairs and sees Hunter crying. She goes over and Kristi aggressively tells Ali not to touch Hunter. When he arrives, Ali, who has now watched the security tapes from the night before, begs him to view the footage of Kristi's attack. After watching the tape, he immediately calls Martine for help. Martine arrives and prepares a cross that will exorcise the demon, leaving Kristi with no memory of having been possessed. After Dan tries one more time to talk to an unresponsive Kristi, Martine says that they will have to perform an exorcism on Kristi to pass the demon onto another blood relative. Dan and Ali argue over the ethics of his plan to transfer the demon to Katie so that his wife and son will be saved. Although Ali pleads with him, begging him not to because it is not fair to Katie, Dan sees no other way to save his wife and son.
When Dan tries to use the cross on Kristi, she attacks him, and the lights in the house go out. They turn the hand-held camera's
night vision on, and find that Kristi has disappeared, along with Hunter. Furniture begins toppling over and the chandeliers in the dining area shake. Dan chases Kristi into the basement where she attacks him. He touches her with the cross, causing her to collapse to the floor, the camera facing the other way as the ground rumbles. Inhuman growls and roars are heard, until finally the shaking suddenly stops. The next scene shows the electricity turning back on, then the other scene is Dan putting Kristi to bed and then burning a photo of a young Katie to pass the demon to her.
Three weeks later, on September 18, Katie visits and asks how things are in Kristi's house; hearing that there have been no further issues, she mentions that strange things have now begun happening at her home. We see Katie return home, where she finds that Micah has purchased a new video camera (this scene consists of approximately the first 2 minutes of the
previous film). The action then cuts to October 9, the night after Micah's death. As Dan watches TV, Katie, now possessed and covered in blood, appears in the living room and breaks Dan's neck. She climbs the stairs and kills Kristi in Hunter's room, hurling her against the camera and taking the baby. Katie then leaves the room, cradling Hunter with a satisfied look on her face. The screen fades to black as Hunter's crying turns to laughter.
The film ends with text stating that Ali returned from a school trip to find the bodies of Daniel and Kristi Rey on October 12, 2006, and that Katie and Hunter's whereabouts remain unknown.
