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Radio personalities Larry Abbot (Gene Wilder) and Vickie Pearle (Gilda Radner) are stars of a mystery show. Since they announced their engagement, Larry has been plagued by speech problems and, seeking out an unconventional cure, he returns to his boyhood home, a mansion in the countryside, bringing Vickie along. Larry reunites with numerous family members, including the flamboyant Aunt Kate (Dom DeLuise), but discovers that there are sinister things afoot within the walls of the creepy estate. Wikipedia