In the early morning hours on November 13, 1974,
Ronald DeFeo Jr. murders his entire family with a rifle at their home of 112 Ocean Avenue in
Amityville, New York. One year later,
middle-class newlyweds George and Kathy Lutz move into the house with Kathy's three children from a prior marriage: Greg, Matt, and Amy. Despite George's
irreligiousness, Kathy, a nominal
Roman Catholic, requests
Jesuit priest Father Frank Delaney to
bless the home. Delaney arrives while the family is out boating. Upon entering the house, Delaney is swarmed by
flies upstairs and hears a hostile voice ordering him to leave, causing him to flee. The next day, Kathy's aunt Helena, a
nun, visits the house but becomes violently ill and leaves abruptly, confounding Kathy. The Lutzes' domestic life begins a sharp decline over the ensuing weeks: George becomes uncharacteristically volatile and abusive, and obsesses over keeping the home warm with firewood, despite Kathy's insistence that it is not cold. George recurrently awakens at 3:15 a.m.—the same time the DeFeos were murdered—while Kathy suffers disturbing nightmares. One night before Kathy's brother Jimmy's engagement party, $1,500 in cash, to be paid to the caterer, inexplicably goes missing from the house. Meanwhile, Jackie, the babysitter watching Amy for the evening, is locked inside a bedroom closet by an unseen force. Further unexplained incidents occur: one of the two boys suffers a crushed hand when a sash window falls on it, and Amy has an imaginary friend, Jody, who seems malevolent. One night, Kathy glimpses two red,
swine-like eyes outside Amy's second-story bedroom window. Delaney makes several attempts to intervene that seem to be thwarted by unusual accidents and occurrences: his phone calls to the home are frequently met with static by Kathy, and on one occasion, his car malfunctions en route to the house, nearly causing a fatal crash. Convinced there are
demonic forces at work, Delaney grows frustrated by the lack of support from his superiors in the
diocese. Meanwhile, George's land surveying business begins to suffer due to his lack of attendance, concerning his business partner, Jeff. Jeff's wife, Carolyn, who has
psychic proclivities, is both repelled and intrigued by the feelings she experiences when she is at the house. In the home's basement, Carolyn is drawn to a brick wall that the family dog, Harry, has repeatedly scratched at, and she begins dismantling it with a hammer. Discovering the damage, George takes down the rest of the wall, uncovering a small room with red walls. Carolyn, in terror, shrieks that they have found "the passage... to Hell!", her voice resembling that of Father Delaney. Later that night, Delaney prays passionately at his pulpit for God to save the family, before he inexplicably
loses his sight and falls
catatonic. Kathy visits the library to research the property's history and finds county records suggesting that the house was built atop a
Shinnecock burial ground and that a known
Satanic worshipper named John Ketchum once lived on the land. She also discovers news clippings about the DeFeo murders and notices Ronald DeFeo's
striking resemblance to George. The paranormal events culminate that night during a rainstorm: blood oozes from the walls and down the staircase; Jody, appearing as a large, red-eyed pig, is seen through a window; and a seemingly
possessed George attempts to kill the children with an axe, but regains his wits after Kathy intervenes. After falling through the basement stairs into a pit of black sludge while rescuing Harry, George and the rest of the family drive away, abandoning their home and belongings. A closing intertitle reads: "George and Kathleen Lutz and their family never reclaimed their house or their personal belongings. Today they live in another state." ==Cast==