AllMovie

On October 31, 2010, four friends living in Los Angeles decided to go on a self-made tour of haunted Hollywood houses and famous celebrity murders, hoping to capture these famous ghosts on camera. After several uneventful ghost hunts, they came upon the house known as 1666. They have been missing ever since. One year later, their film was found miles away from their last known location. Their footage was compiled and made into a movie: KNOCK KNOCK 2.