Images

Cathryn receives strange, mocking phone calls late at night in London, hinting that her husband is having an affair. She experiences a vision of a man who looks like Hugh but behaves as her dead lover, Rene. The unsettling blend of calls and visions foreshadows a collapse of reality.

Hugh comes home and tries to comfort Cathryn, but she keeps seeing a figure that shifts between Rene and Hugh. The vision unsettles her and deepens the sense that something supernatural is at play. She struggles to distinguish truth from illusion.

Hugh proposes a vacation in an isolated cottage in the Irish countryside to help Cathryn focus on her book. They travel there together, seeking peace away from London. Cathryn remains unsettled, listening for voices and glimpsing apparitions as they arrive.

On arrival, Cathryn immediately hears her name spoken and catches glimpses of apparitions. In the kitchen she sees Hugh pass through and then transform into her dead lover Rene, who continues to speak to her. The invasion of these doppelgängers intensifies her paranoia.

Marcel, an ex-lover and neighbor, brings his daughter Susannah to visit, and Cathryn's grip on reality weakens as the men seem to shift into one another. She cannot tell Hugh from Rene or Marcel, as each man appears in different forms. The house becomes a maze of distorted identities.

Rene taunts Cathryn and hands her a shotgun, pushing her toward killing him. She shoots Rene in the abdomen while Susannah is nearby, and afterward claims the gun fired accidentally as she moved it. The incident leaves a trail of shattered trust and growing fear.

Seeking a respite, Cathryn goes to a nearby waterfall where the doppelgänger reappears. Hugh leaves to attend to business, and Cathryn later confronts Marcel inside the house, who tries to entice her; she stabs him through the chest with a kitchen knife. The boundary between reality and illusion becomes increasingly blurred.

The next morning, an elderly man walking his dog stops by, and Cathryn invites him inside despite Marcel's apparent corpse in the living room. The old man declines the welcome, leaving Cathryn more unsettled and unsure what is real. She wonders if she truly killed Marcel.

Susannah visits again and notes that her father was not at home when she woke. Cathryn grows anxious about her own actions as Marcel returns drunk after midnight, and Susannah is invited in for tea while Cathryn tries to maintain normalcy. Susannah's remarks heighten the sense that something terrible has occurred.

Cathryn drives Susannah back home and Marcel steps outside to talk; she leaves, then encounters the doppelgänger at a bend in the desolate road. The two seem to speak in unison as Cathryn tries to ignore the apparition.

Back at the cottage, the bodies of Rene and Marcel reappear in the living room, and the doppelgänger pleads to be let inside. Cathryn confronts the doppelgänger on the road and drives it off a cliff into a waterfall. The violent confrontation pushes the story toward its irreversible conclusion.

Cathryn returns to London and, while showering, the doppelgänger enters the bathroom. She screams that she killed him, but the doppelgänger remains calm, while Hugh's corpse is shown lying at the bottom of the falls. The truth about what happened remains shrouded in ambiguous horror.