When Elly's friend asks her to look after an elderly woman who lives alone in a cabin for a few days, she gladly accepts. She agrees without hesitation, reasoning that a day in the woods would be a relaxing break. Elly's hallucinations make it difficult to distinguish between reality and her fantasies, making her time in the cabin anything but restful. Elly, whose visions have taken over, comes to understand that the woman's demonic possession was the driving force behind her visit.