On a chilly autumn night, home video footage captures Monica Olive, Esther Haltom, and Nick Corrado Caleb Courtney as they try their hand at a Ouija board, hoping for a simple thrill. The session twists into something darker when a spirit identifies itself as Zozo, and Monica abruptly convulses, her body seized by an unnerving force that unsettles everyone watching. Tess [Kelly McLaren] writes a letter to the reported Zozo survivor Darren Evans Darren Wayne Evans and then recounts the unnerving experience to him, laying the groundwork for what follows.
The story shifts to a Halloween night gathering on Paradise Island, where Tess joins her friend Aidan Demetrius Sager for a retreat at Aidan’s father’s island cabin. They are joined by old friends Nick and Dean Caleb Debattista, along with Dean’s new Wiccan girlfriend Mel Courtney Foxworthy. A man named Skip John Vejvoda ferries the group across the water to their secluded destination, setting the stage for a night that blends nostalgia with something far more perilous. The cabin’s atmosphere grows tense as the adults settle in, and the younger women begin to bond over carving a pumpkin, a moment that quickly yields a darker undertone as Mel experiences an asthma attack while explaining a Wiccan holiday she calls Zoan.
As evening folds into night and the lights flicker, the electricity inexplicably fails, heightening the claustrophobic mood. Nick keeps spirits light with a card trick, but Mel insists on reopening the Ouija board. Dean remains skeptical, even as Mel and Dean use the board blindfolded, Tess acting as the primary transcriber and scribe for the night’s conversations with whatever entities might be listening. A brief contact with Tess’s deceased cousin Adam gives way to a more ominous presence when a boy named Oliver warns of an impending danger. A loud bang on the door startles the cabin, and Aidan goes to investigate, returning with nothing but a growing sense of unease. Mel’s insistence on continuing clashes with Dean, so Tess steps in to take over the questioning, while Aidan temporarily replaces Tess as the board’s transcriber.
The mood darkens as a new, hostile spirit begins to threaten and insult Mel. Tess probes for answers, and the spirit claims to be Tess’s guardian, even as the questioning gradually reveals that the entity is Zozo rather than a benevolent protector. The malevolent presence threatens to kill them all, and in a chilling display, Zozo repeats Nick’s earlier magic trick — making a card vanish and declaring that he is in the bathroom. The group moves downstairs to confront the strange phenomenon, where Aidan sees something that terrifies him, and Nick discovers a shirt tucked behind a door, a detail he credits with rattling his friend. With fear mounting and the night’s events spiraling, the group agrees to call it a night, but not before something unseen lashes out at Tess in her sleep.
In the morning, Tess recounts the night’s terrors to Mel and reveals a parallel family history: her mother experienced a terrifying encounter that left her paralyzed, floated along the ceiling, and saw a vision of a baby dying in a fire; Tess’s sister had died just days after birth. Mel confesses that she continued playing with the Ouija board after everyone else had gone to bed, contacting her cousin Adam again, though his responses oddly circle back to questions about Tess. The group’s uneasy dynamic continues at breakfast as Aidan guts a fish he caught earlier and serves it for dinner. Tonight’s meal becomes a reflective moment when Dean explains how he first befriended Aidan during a time when Aidan served as a paramedic who saved Dean’s life. Tess and Nick reveal they met at school, hinting at histories that bind the group, and Aidan shares his grandfather’s homemade vodka as the party atmosphere resumes.
Night returns with a renewed sense of dread. Tess wakes to find Mel alone by the fireplace still engaged with the Ouija board, claiming that Dean had passed out and that Nick and Aidan had gone outside. Tess moves to help, retrieving Mel’s inhaler from another room, only to return and find a jack-o’-lantern slashed with a knife. Mel’s blanket is draped over her like a shroud as she sits in a trance, and Tess, frightened, pulls back the covering. Mel’s trance deepens into unsettling laughter, and as another asthma episode hits, Tess searches for a second inhaler in the bathroom, only to become locked inside. Tragically, Mel dies in the ensuing chaos, and Tess discovers the missing card from the previous night hidden in a bathroom vent.
The night’s horrors leave Tess emotionally shattered as she finishes recounting the events for Darren Wayne Evans. Darren departs with the Ouija board, leaving Tess at Beloit View Psychiatric Hospital to begin processing what happened. The film’s epilogue reveals a brutal consequence back on the island: Dean, unable to cope with Mel’s death, takes his own life a year later, a stark reminder of how the night’s terror echoed beyond the cabin into the lives of everyone involved.