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College student Jenny (Laurie Walters) meets aspiring journalist John (Joe Spano), who convinces her to go on a picnic with him. While lost in the countryside, the pair stumble upon a sprawling, rickety estate that years ago had been the Soda Spring Health Spa. A kindly old woman (Edna Macafee) who lives in a restored section of the main house offers them tea and a tour, but Jenny feels strangely dizzy and is sure that she saw a strange apparition in a wedding dress float by in the hall. Though the place gives her the creeps, John talks her into returning a few days later so he can write a feature story about the history of the spa. Jenny arrives early and is shocked to find no sign of the old woman at all, and a kindly hunter who passes by confirms that the decrepit spa has long been abandoned, ever since a sinister cannibalistic episode forced it to close down 50 years before. When John finally shows up, the old woman and her clean, orderly living quarters are suddenly back, and Jenny starts to realize that something evil and supernatural is afoot. A padlocked meat locker holds enough evidence to prove without doubt that Jenny is intended to be the focus of a hideous Satanic rite.