The film opens in Aswan, Egypt, where a family returns to their home and a troubling scene unfolds. The Magician, Hayat Kamille, watches as her husband Gamal tries to lift a sealed sarcophagus beneath the house. When the lid is pried loose, a jagged hook catches Gamal’s jaw and he is killed in a sudden, brutal moment. A hush falls over the courtyard as the family forks into mourning, but the real danger has only just begun.
Across the city in Cairo, journalist Charlie Cannon, Jack Reynor covers urgent stories with his pregnant wife, Larissa, Laia Costa, and their two children, Katie Emily Mitchell and Sebastian Dean Allen Williams. Katie, who often wanders outside to meet with a girl named Layla, is given a nectarine by The Magician. A scarab breaks from the fruit and crawls into Katie’s mouth, and as Charlie and Larissa notice odd signs around the neighborhood, Katie vanishes into the crowded streets as a dust-filled sandstorm roars through Cairo. The chase ends with The Magician carrying Katie beyond reach, leaving Charlie to confront a bewildering mix of fear and responsibility.
Eight years later, the Cannons are living in Albuquerque, with a now-teenage Sebastian and their younger daughter Maud [Billie Roy], while Larissa’s mother Carmen [Veronica Falcon] stabilizes their lives from the sidelines. The family has avoided returning to Egypt, but their past shadows loom large. In a remote stretch of woodlands, a teen on a bike witnesses a plane crash and the discovery of a sarcophagus, mirroring the artifact The Magician guarded years earlier. Archaeologists retrieve the container and open it to reveal Katie, now wrapped in bandages and looking unnervingly alive despite her pallid, almost corpse-like appearance. She gasps and awakens, sparking a race to understand what happened to her.
The moment the Cannons hear Katie has been found alive, relief collides with unease. At the hospital, Katie is present but catatonic, producing only faint gasps. The family brings her home, where Carmen prays for a return to normalcy, only to be struck by a sudden, vicious convulsion as Katie’s condition worsens before their eyes. The household atmosphere frays when Larissa and Carmen attempt to care for Katie, and a traumatic accident reveals the extent of what lurks beneath: Katie’s body bears bindings etched with ancient script, telling of an imprisoned entity known as the Nazarenian.
Seeking answers, Charlie enlists the help of a professor, and a crucial clue appears in Morse code—Katie repeats the word “Layla,” a signal from her time away. Charlie reconnects with Dalia Zaki [May Calamawy], a detective who has spent years chasing the truth behind Katie’s disappearance. Dalia travels to Aswan, where she confronts The Magician and uncovers the dark history of Layla Khalil, an adult Layla [May Elghety] who lost her tongue as a child because she tried to reveal the truth. Layla hands Dalia a tape that contains Katie’s name and a warning that there is more to the story than anyone realizes.
Back home, the Nazarenian’s influence intensifies, pushing its control through Maud and then Carmen’s family lineage. Maud’s fearsome actions—tearing at her own teeth and then showing a bloody grin—signal the demon’s creeping reach. Katie escalates, attacking the preacher by biting his ear and finally climbing into the casket where Carmen’s body spills out, creating a shocked, sorrowful spectacle that cements the family’s resolve to fight back. Katie’s assault escalates to biting through a neck while swallowing embalming fluid, a chilling reminder of the Nazarenian’s reach.
Dalia visits with the videotaped confession, revealing the ritual by which the Nazarenian travels from a spent vessel into a fresh body, typically a child whose vitality can last longer. The tape unveils how the Nazarenian was passed into Katie, and Larissa insists they witness the ritual to understand how far the demon has gone. Katie uses the hypnotized Sebastian to remove bindings from her skin, allowing the Nazarenian to unleash its full power and unleash a brutal, others-worldly assault on the family. Charlie fights to subdue Katie, while Dalia becomes a conduit for the ritual through a dangerous throat incision that enables a spoken incantation. In a final, desperate moment, Charlie sacrifices his own safety and allows the Nazarenian to transfer into him, pushing the family back toward a fragile normalcy as Katie begins to return to herself.
The family tentatively bonds again as Charlie remains in the sarcophagus, tapping a Morse code “I love you” to his children. Katie slowly reclaims her relationship with her siblings, and Larissa calls Dalia to discuss the next steps. The Magician remains imprisoned in a cell, but the looming threat is far from resolved: Larissa arrives with a decisive plan to re-enact the ritual, intending to seal The Magician as the Nazarenian’s permanent host once more. In the tense, final moments, the ritual is set in motion, offering a bleak glimpse of a future where the others’ safety depends on a dangerous act of possession that could trap their family forever within a loop of ancient power.
