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On an isolated stretch of land 50 miles outside of San Francisco sits the most haunted house in the world. Built by Sarah Winchester, heiress to the Winchester fortune, it is a house that knows no end. Constructed in an incessant twenty-four hour a day, seven day a week mania for decades, it stands seven stories tall and contains hundreds of rooms. To the outsider it looks like a monstrous monument to a disturbed woman’s madness. But Sarah is not building for herself, for her niece or for the brilliant Doctor Eric Price whom she has summoned to the house. She is building a prison, an asylum for hundreds of vengeful ghosts, and the most terrifying among them have a score to settle with the Winchesters. Inspired by true events.