“Insidious: The Last Key” is a 2018 horror film directed by Adam Robitel and written by Leigh Whannell. It follows parapsychologist Elise Rainier as she returns to the New Mexico home where she witnessed a tragic event decades earlier. The film is the fourth entry in the series and the second in its internal chronology, following the events of “Insidious: Chapter 3” (2015).
Trailer, via Sony Pictures Entertainment.
The Homecoming
Elise, played by Lin Shaye, travels to Five Keys, New Mexico, to investigate a haunting at a house she recognizes as her childhood home. Specs, played by Whannell, and Tucker, played by Angus Sampson, join her. Inside, they find a young woman Ted Garza has kidnapped, and they discover a hidden basement room.
Keyface Returns
The film’s central horror comes from a demonic spirit known as “Keyface,” which Elise inadvertently released as a child. In 1953, she and her brother Christian were terrified by a spirit in their bedroom. Christian lost a whistle their mother gave him to call for help. Not believing Elise’s story, her father Gerald beat her and locked her in the basement. Elise found a mysterious red door and opened it, releasing Keyface, who killed their mother Audrey.
A Family Left Behind
Elise tells her colleagues she ran away from home to escape Gerald’s abuse, abandoning Christian. In the present day, Christian’s daughters, Melissa and Imogen, played by Spencer Locke and Caitlin Gerard, are furious at Elise for leaving. Elise hopes to repair their relationship by giving Melissa a photo of the whistle to show Christian.
The Whistle’s Fate
The whistle reappears during the investigation, then disappears again. When Specs and Tucker kill Ted in self-defense, Christian and his daughters enter the house to find the whistle. Melissa is attacked by Keyface, who sends her into a coma with her consciousness trapped in the spirit realm of the Further.
The Hidden Suitcases
Elise searches the house and discovers hidden suitcases containing belongings of numerous other women who had been kidnapped. The film makes its point about the scope of the evil in the house without spelling it out in full.
The Verdict
“Insidious: The Last Key” is a film that knows exactly what it is: a horror movie that wants to terrify you in a familiar way, with a haunted house, a demonic presence, and a family legacy of fear. It does not attempt to be anything else.
The performances are competent across the board. Shaye sells the weight of Elise’s guilt, and Sampson and Whannell play their familiar roles with the energy the series demands. The young cast, including Ava Kolker as young Elise and Pierce Pope as young Christian, does solid work in the flashback scenes.
The film’s weakness is its pacing. At 103 minutes, it feels stretched at times, with scenes that drag rather than build tension. The red door, the whistle, and the house itself are presented as deeply threatening, but the film spends too much time explaining its own setup rather than letting the horror breathe.
The final act, which finds Keyface attacking Melissa, delivers the most sustained scare of the film. The setup of the hidden suitcases adds a layer of horror that feels more urgent than the film’s earlier stretches.
The Score
“Insidious: The Last Key” is a solid entry in a franchise that has rarely disappointed its core audience. It is not a masterpiece, and it does not try to be. It is a haunted house story told competently, with a strong cast and a decent scare quotient. It will satisfy fans of the series and newcomers looking for a straightforward scare.
“Fear comes home.”
The film’s tagline captures what it does well: it brings the series’ central horror back to where it began, in a house Elise Rainier has tried to forget.
The film’s ending, which leaves the fate of Melissa unresolved, sets up a future chapter in the series, “Insidious: The Red Door,” released in 2023. That film continues the story of the first two films in the franchise.
“Insidious: The Last Key” is a workmanlike horror film that does not overreach. It is not a great film, but it is a good one, and it knows exactly where it stands.
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