When a television producer visits the home of a brother and sister to interview them for his series on paranormal phenomena, what first appears to be a simple case of psychopathology turns into a full-blown epidemic of demonic manifestation. To his horror he realizes that he is not only a witness to the blossoming insanity, filming each scream and horrific expression, but that he and his technology have been intricately tied to the cause and conduit of its spread…