In the climax, Ellison discovers a series of mysterious home movies in the attic, each depicting a different family being murdered in various gruesome ways. He realizes that the supernatural entity, Bughuul, is responsible for these murders and that the films are a means for Bughuul to consume the souls of the children involved.
In the resolution, Ellison uncovers that his own family is in danger. His daughter, Ashley, has become possessed by Bughuul, and she murders her family while being filmed. Ellison becomes the latest victim in the series, joining the other families whose deaths were captured on the sinister home movies.
The film ends with the implication that the cycle will continue, with Bughuul moving on to the next unsuspecting family. The eerie and unsettling conclusion leaves viewers with a sense of dread and uncertainty about the malevolent force at the center of the story.
“Sinister” is praised for its atmospheric tension, disturbing imagery, and unconventional narrative. The ending contributes to the film’s horror by leaving audiences with lingering questions about the nature of Bughuul and the cycle of violence it perpetuates.