In 1976, paranormal specialists Ed and Lorraine Warren record the Amityville murders at the Amityville house, to decide whether an evil nearness was really in charge of Ronald DeFeo Jr. mass killing his family on November 13, 1974 and the resulting frequenting episode including the Lutz family. Amid a seance, Lorraine is drawn into a dream where she remembers the killings and finds a devilish religious recluse figure, which chokes her. In the wake of seeing Ed being lethally skewered, Lorraine can break out of the vision. After one year, in 1977, the Hodgson family starts to find weird events inside their home in London.

Janet, the second most established of four kids, is seen sleepwalking and bantering in her fantasies with an element as a furious elderly man, who demands that the house is his. In the long run, all kin of the house and their mom Peggy witness paranormal occasions happening just before their eyes, driving them to look for shelter with their neighbors. At the point when the media endeavors to meet the Hodgsons, Janet is controlled by the soul of an elderly man, Bill Wilkins, who is uncovered to have already lived and kicked the bucket in the house. Amid the ownership, Wilkins expresses that he appreciates tormenting the family and needs to assert back his home. As Janet hints at more wicked ownership, the story in the long run achieves the Warrens, who are asked for to help the neighborhood church in the examination and demonstrate regardless of whether it is a trick.

Lorraine, in dread of her vision of Ed's passing getting to be reality, cautions him not to get excessively included for the situation, and reluctantly consents to go to London. She has yet another vision of the evil religious recluse in Ed's review wherein the devil says its name, which Lorraine writes in her Bible. While remaining at the Hodgson habitation, Ed and Lorraine counsel with other paranormal specialists, including Maurice Grosse and Anita Gregory, on the authenticity of the case. They additionally endeavor to speak with Wilkins' soul, planning to persuade him to quit frequenting the family. One night, after the Hodgsons witness Janet being controlled, Gregory presents video confirmation of Janet deliberately destroying the kitchen as though for a trick, along these lines disparaging the frequenting.

In light of this revelation, Ed and Lorraine must choose the option to leave the family all alone, however soon find that the soul of Wilkins is just a pawn, being controlled by the wicked pious devotee, to frequent Janet and break her will. Loraine then understands that her capacities have been hindered by the satanic soul that has been frequenting her in her dreams. Ed and Lorraine rapidly come back to the Hodgson living arrangement, just to discover Janet being had afresh and whatever is left of the Hodgsons bolted outside the house. Ed wanders inside the house alone. A lightning strike hits a tree close to the house, leaving a rugged stump looking like the question that pierced Ed in Lorraine's vision.