Compassionate psychiatrist Dr. Rose Cotter, haunted by her own childhood trauma, treats the most vulnerable patients. But a new case, Laura's, puzzles her. As Rose tries to rationalize Laura's delusions, she experiences terrifying encounters with the unknown, causing her to question her own grip on reality.

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As a psychiatrist still grappling with the aftermath of a disturbing event involving a former patient, she begins to experience a creeping sense of unease, convinced that a malevolent force is stalking her.