The listing, paranorma; activity 4 has ended.
On October 9, 2006, Kristi Rey and her husband Daniel are killed by her demon-possessed sister Katie (Katie Featherston). She then abducts Kristi's 1 year old son, Hunter, unaware that Daniel's teenage daughter, Ali, is still alive and away on a school trip. A text states that Katie and Hunter's whereabouts remained unknown.
In November 2011, a teenager named Alex (Kathryn Newton) and her family live in suburban Henderson, Nevada with her mother Holly (Alexondra Lee), her father Doug (Stephen Dunham), and her little brother Wyatt (Aiden Lovekamp). Alex and her friend Ben (Matt Shively), who is going to Mexico, discover their neighbor's child, Robbie (Brady Allen), hiding in their family treehouse. The next day, Robbie's mother falls ill and is taken to the hospital, leaving Robbie in the care of Alex's family. Robbie begins mentioning an invisible friend, whose presence is captured by a series of cameras set up by Alex and Ben. One night, Alex notices several cars outside Robbie's house, but flees after being confronted by a woman. During the day, Robbie draws a green symbol on Wyatt's back, which Alex later determines to be associated with witchcraft and demonic possession.
The following day, Robbie takes Wyatt to his house. Alex follows them and finds Robbie's mother, who is actually Katie. The next night, Doug experiences some paranormal activity himself when one of Holly's missing knives tries to fall on him. Meanwhile, Wyatt talks to an invisible being, seemingly pleading that his name is not Hunter. The next day, Wyatt confides in Alex that Katie told him he was adopted, like Robbie, and that his birth family needs him. After being violently pulled underwater in the bath by an unseen force, remaining underwater for a long time, Wyatt emerges, now referring to himself as Hunter. He goes into Alex's room and levitates a sleeping Alex into the air. The next morning, as Alex checks the footage on her computer, it seems like she can't get her files open.