The Visitor resembling Macy’s deceased father appears outside the front door, looking bewildered and distressed. Though it pleads with Macy to run, its hands simultaneously work to force the door open. The locked door holds, so the Visitor circles the house searching for another entrance while maintaining unsettling eye contact through the windows.

Macy notices the unlocked patio door and races to secure it just as the Visitor reaches for the handle. Separated only by glass, she observes that its eyes are pale blue, rather than her father’s hazel eyes. The Visitor continues begging her to flee even as it tries to break through. Macy becomes convinced that the Visitor is truly not her father.

Macy opens the third emergency envelope, which contains only the word “BASEMENT.” As the Visitor begins ramming the patio door and cracking the glass, Macy flees downstairs, dropping her phone and tumbling in the dark. In the basement, she discovers a white door emitting a thin line of red light. Drawn forward by an inexplicable compulsion, she enters a windowless room with the old television displaying a solid red screen. The VCR beside it activates on its own, the emergency letter in her pocket changes to read “WATCH,” and the tape begins playing.

The tape opens with a brief exterior shot of the Windfall Inlet at sunrise before cutting to the house’s foyer, where a frightened David stands in a muddy rain poncho, listening to someone on the phone while writing urgently in a leather notebook. The tape then cuts to David hiding in the storage room, speaking barely above a whisper directly to the camera. He explains that the viewer is watching this video because a Visitor has taken the form of someone they lost. This is the consequence of failing to burn the white rabbit alive. He states that the Visitor must be killed and warns that a light in the foyer will activate; the viewer must extinguish it within three minutes, or a red sun will rise. He cautions that the Visitor will work to undermine the viewer’s resolve. His recording is cut short when a young man’s voice calls to his father from off-screen; dread spreads across David’s face, and he begins whispering a fragmented prayer before going silent.

Without explanation, the tape shifts to a scene from Macy’s childhood: She, Jemma, and their father stand in the family garage while he tinkers with a lawn-mower engine, a quiet and warm moment. As a high-pitched tone rises, the footage cuts to a murky underwater shot of a strong current slowly pushing toward her father’s rusted white pickup resting at the bottom of a river. The screen returns to solid red.

The door bursts open, and Macy strikes the intruder with the VCR. When the figure turns toward her, Macy sees that it isn’t the Dad-Visitor but someone who appears identical to Jemma, blood trailing from her temple. The television’s red glow reflects off the figure’s glasses, obscuring its eye color. Remembering David’s warning not to hesitate, Macy prepares to strike again, but the Jemma-Visitor staggers backward and fatally strikes its skull against the concrete floor.

Macy’s protective instincts override her caution. She drops the VCR, rushes to the motionless figure, and removes its glasses. The eyes are hazel, just like the real Jemma’s. Despite finding no breath or pulse, Macy repeatedly attempts CPR on Jemma, unable to accept what has happened.

She retrieves her phone and discovers 17 missed calls and nine voicemails from Jemma, warning her about a disturbance and urging her to leave the house. When Macy dials her sister’s number, the ringtone sounds from behind the closed door where the body lies. Convinced that the house is tormenting her psychologically, Macy climbs the basement stairs while repeating that the dead figure was not really Jemma.

Just before dawn, Macy stands in the kitchen, emotionally hollowed out. The cracked but unbroken patio door confirms that the Visitor in her father’s form never made it inside; its boot prints lead away across the yard and into the tree line. An open window bears what appear to be Jemma’s handprints, with wet footprints tracking toward the back hallway. The foyer light then activates, the signal for the final Rite. Macy has three minutes to switch it off. She walks to the switch, raises her hand, and then stops. She decides that she’s finished, steps back, and lets the deadline expire.

She pulls on her father’s jacket, exits through the patio door, and follows the Visitor’s boot prints to the property’s boundary rope, where they vanish. The white rabbit hops just past the rope and then collapses and stops breathing. Macy steps over the rope and continues toward Windfall Bluff, indifferent to the consequences that the failed Rite will bring. At the cliff’s edge, the chronic tightness in her chest finally eases. The sun crests the horizon golden-white, instead of red. Confused, she answers her phone when it starts buzzing: It’s Jemma, alive, calling from a moving vehicle. She says that she’s nearly at the house and has already called emergency services. As Macy feels relief over her sister’s survival, the golden-white sun turns red.