Joan Walker (Jennifer Jason Leigh) moves to 112 Ocean Avenue in Amityville, New York, forty years after a notorious killing of a family occurred. She is in the hopes that some of the hair-raising rumors are real and there are dark evil powers remaining that can cure her comatose son (Cameron Monaghan). After oldest daughter Belle (Bella Thorne) brings home some friends to watch the movie Amityville Horror in the infamous house...nightmarish activity awakens.