Paranormal Activity is a 2007 American supernatural horror feature film written and directed by Oren Peli.
Originally developed as an independent feature and given film festival screenings in 2007, the film was acquired by Paramount Pictures and modified, particularly with a new ending.
The film earned nearly $108 million at the U.S. box office and $194 million worldwide. Paramount/DreamWorks apparently acquired the U.S. rights for $350,000.
Paranormal Activity is the most profitable film ever made, based on return on investment, although such figures are difficult to verify independently as this is likely to exclude marketing costs.
In 2006, Katie (played by Katie Featherston) and her boyfriend, Micah (Micah Sloat), are a young couple who recently moved into a two-story tract house in suburban San Diego, California. Katie claims that an “evil” presence has haunted her since childhood and believes that it has followed her to their new home.
Each night, Micah mounts a Sony HDR-FX1 on a tripod in their bedroom to record any paranormal activity that might occur while they sleep, in the hopes of solving the problem himself. The first night, the only thing they catch are footstep noises and the sound of keys dropping, which they find on the floor downstairs the next day.
Katie hires a psychic, Dr. Fredrichs (Mark Fredrichs), who assesses that she is being haunted not by a ghost, but by a demon. He says the demon feeds off negative energy, and its intent is to haunt and torment Katie no matter where she goes. He advises them not to taunt or communicate with the demon, and to contact demonologist Dr. Johann Averies for help…