Plot: The Paranormal Activity film series continues with this fourth entry from Paramount Pictures and returning directors of the previous outing, Henry Joost and Ariel Schulman. This time, the cell phones and computer cameras are focused on a teenage girl (Kathryn Newton) whose family allow a young boy in their neighborhood named Robbie (Brady Allen) to stay with them while his mom is sick. Soon after, eerie things start happening in the household, some of which focus on the girl's younger brother Wyatt. As the bumps in the night become more pronounced, the mysteries surrounding Robbie's family and the house across the street grow to the point where the only thing for the teen girl to do is investigate herself.
Alternative Plot: It has been five years since Katie (Katie Featherston) murdered her sister and disappeared with her infant nephew, Hunter, in tow. Now, a new family is about to fall prey to nighttime terrors. A mysterious accident next door leads to teenage Alex (Kathryn Newton) and her family becoming the temporary guardians of Robbie (Brady Allen), a very creepy neighbor boy. Cameras installed throughout Alex's home capture the sinister events that unfold after Robbie's arrival.
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