Overview
Paranormal Activity 3 is a 2011 American found footage supernatural horror film, directed by Henry Joost and Ariel Schulman. It is the third installment of the Paranormal Activity series and serves as a prequel, mostly set 18 years prior to the events of the first two films. It was released in theaters on October 21, 2011. Paranormal Activity 3 was also Joost and Schulman's first horror film.
The film broke financial records upon release, setting a new record for a midnight opening for a horror film ($8 million) and the best opening day for a horror film in the United States ($26.2 million).
Plot
In March 2005, Katie delivers a box of old videotapes to her pregnant sister Kristi Rey and her husband Daniel, which holds footage of young Katie and Kristi with their mother, Julie, and her boyfriend Dennis. A year later, Kristi and Daniel's house is ransacked and the tapes are missing. The VHS footage, filmed in 1988, makes up the rest of the film.
A young Katie and Kristi are living with their mother Julie and her boyfriend Dennis (as their biological father had left them for reasons unknown). Dennis notices that since Kristi's imaginary friend "Tobi" appeared, strange things have been happening around the house. After filming an earthquake in the couple's bedroom and noticing an invisible figure in the footage, Dennis is advised by his friend Randy to place cameras throughout the house. Dennis and Julie hire a babysitter named Lisa to watch the kids, but she becomes desperate to leave due to several terrifying incidents. The following night, Kristi tells Tobi they're not friends anymore.
From Wikipedia (CC BY-SA 4.0).