Paranormal Activity 2 is a 2010 American found footage supernatural horror film directed by Tod Williams and written by Michael R. Perry, Christopher Landon and Tom Pabst. The film is a prequel to the 2007 film Paranormal Activity, beginning two months before and following up with the events depicted in the original film. It was released in theaters at midnight on October 22, 2010 in the United States, the United Kingdom, Canada, Mexico, Brazil, Argentina, Poland and Ireland. An unrated version of the film was also released.
In August 2006, a "burglary" occurs at the home of Kristi and Daniel Rey, trashing their house and leaving only their infant son Hunter's bedroom untouched. The only thing stolen is a necklace that Kristi's sister, Katie, gave to her. Martine, the Latin American family housekeeper and nanny, senses "evil spirits" in the house and burns sage to rid the house of them, and Daniel fires her for doing so. Kristi also believes that their home is haunted, and she and Katie talk about being tormented by a demon when they were children. Daniel, however, initially dismisses her claim despite footage of strange occurrences around the house. Daniel's daughter from a prior marriage, Ali, begins investigating the mysterious happenings; she discovers that humans can make deals with demons for wealth or power by forfeiting the soul of their first-born son, but if the deal is not fulfilled, the demon will stick to the family until another son is born—Hunter was the first male to be born on Kristi's side since the 1930s.
The violence escalates, as the family's German shepherd, Abby, is attacked by the demon and apparently suffers from a seizure. As Daniel and Ali take Abby to the veterinarian, Kristi is attacked and dragged into the basement by the demon, possessing her. The following day, Ali is left home with Kristi, unaware she is possessed. Soon, Ali hears a scratch sound in the basement door and opens it to find scratches and sees a word, meus (Latin for "Mine"), etched into it. A strange bite mark on her leg and the footage of Kristi’s attack motivates Daniel to re-hire Martine, who prepares a cross to exorcise the demon; Kristi will have no memory of having been possessed. Daniel goes to pass the demon onto Katie so that Kristi and Hunter will be saved, despite Ali's pleas not to.
That night, when Daniel tries to use the cross on Kristi, she attacks him and the houselights all go out. Using the handheld camera's night vision, he walks around the shaking house into the basement where he is attacked by Kristi; he retaliates against her with the cross, causing her to collapse. Daniel puts Kristi to bed and burns a photo of a young Katie, passing the demon onto her. Three weeks later, Katie visits and explains that strange things have begun happening at her house. On October 9, a night after Micah is killed, a possessed and bloodstained Katie breaks into the Rey house, kills Daniel and Kristi and then takes Hunter with her. Ali comes home from a school trip to find the corpses, and Katie and Hunter's whereabouts remain unknown.