An army of priests invade the legendary Long Island haunted home armed with crucifixes and holy water, determined to drive the demonic forces out once and for all. Thinking they're successful, the home goes on the market and all of the furniture is put out on the lawn for a yard sale. A strange looking brass lamp standing about six feet tall catches the eye of Helen (Peggy McCay), who decides to purchase it for her widowed sister Alice (played by classic film actress Jane Wyatt). Helen cuts her finger on the lamp before shipping it out to Alice's coastal California home, comes down with a deadly tenanus infection and dies in the hospital soon after. Meanwhile, the lamp arrives at Alice's just as her newly widowed middle-aged daughter Nancy (TV movie queen Patty Duke) shows up trying to put her life back together. Nancy's husband has recently passed away and now she's stuck with no money, no education and three kids to support; teen daughter Amanda ("Geri Betzler"/Zoe Trilling, of NIGHT OF THE DEMONS 2 fame), middle son Brian (Aron Eisenberg) and withdrawn 11-year-old daughter Jessica (Brandy Gold). Granny's a little on the cold, unfeeling side and is having a hard time dealing with all the commotion in the house, but she'll soon realize dealing with the return of her daughter and grandkids is a walk in the park compared to dealing with demons who love to possession appliances and electrical devices to do their dirty work. Meanwhile, back in Amityville, hunky Father Kibbler (Fredric Lehne), who was knocked out the night of the exorcism right after seeing a demon face in the globe of the lamp and has just been released from the hospital, searches for the whereabouts of the cursed light. Can he get out to California in time to save the family?
So what will you find in this PG-13 rated sequel? A pet bird in a toaster oven. A hand burnt by a hot kettle. A hand down a garbage disposal. Someone brushing their teeth with overflowed sewage. Black slime. An out of control chainsaw. A melting telephone. A levitating little girl. A dead plumber. Possession of the youngest daughter, who is wooed over to the dark side by visions of her dead dad. Some mild home destruction. And a whole lotta family drama. The acting is alright. The dialogue is alright. The production values are alright. The direction is alright. It was made for television and has a definite TV movie of the week feel, though. Some may be bored with what they see. It's mighty derivative, unoriginal and nothing special at all, but it'll still pass the time adequately. I actually thought it was mildly better than most of the other films in this series.
Additional violent scenes that were removed from showings on the boob tube have been restored for the home video release. Part 4 is also notable as the first AMITYVILLE entry to take place primarily away from the actual home. The idea of a cursed piece of furniture carrying the Amityville evil along with it to a new setting (called "transmigration" here, but I've also heard it called "transference" elsewhere) is the plot devise that showed up in most of the sequels from here on out.