Ensconced in her sprawling San Jose, California mansion, eccentric firearm heiress Sarah Winchester (Dame Helen Mirren) believes she is haunted by the souls of people killed by the Winchester repeating rifle. —GWL Inspired by true events. On an isolated stretch of land fifty miles outside of San Francisco sits the most haunted house in the world. Built by Sarah Winchester (Dame Helen Mirren) 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 an outsider it looks like a monstrous monument to a disturbed woman’s madness. But Sarah is not building for herself, for her niece Marion (Sarah Snook), nor for the brilliant Dr. Eric Price (Jason Clarke), who she has summoned to the house. She is building a prison, an asylum for hundreds of vengeful ghosts, and the most terrifying amongst them have a score to settle with the Winchesters. Sarah Winchester (Dame Helen Mirren) is the widow of famed gun manufacturer William Wirt Winchester. Her husband’s sudden death and the previous death of their child Annie have left her in grief. Having received more than twenty million dollars in inheritance, Winchester convinces herself she is cursed by the ghosts of those who died at the hands of Winchester firearms. After seeking advice from a medium, she begins building an enormous, seemingly never-ending mansion in San Jose, California that would eventually be named the Winchester Mystery House. The house is under constant construction and Sarah’s relative Marion Marriott (Sarah Snook) lives in the house with her son Henry (Finn Scicluna-O’Prey). At night, Henry is possessed by a mysterious entity.