Continuing the actual event adaptation settings of the first two episodes, "The Conjuring 3" continues to revolve around the Warren couple played by Vera Farmiga and Patrick Wilson, restoring the demon possession incident of Arne Johnson in the United States in 1981.
The film continues to be adapted from the real exorcism incident of Ed and Laurie, and the story is based on the real occurrence of "Arne Johnson's Demon Possession Incident". In 1981, in Brookfield, Connecticut, a tenant named Arne Johnson murdered the landlord Alan Bono. During the trial, Arne Johnson claimed that “the room was haunted and the devil instigated himself” committed the crime. This is also the first case in the United States where “devil possessed” was used as an excuse to defend himself. The court invited the Warrens to investigate this case. , This is also one of the most famous supernatural cases they have ever done.
