A man recently released from a mental institute inherits a mansion after his parents die. After a series of disturbing events, he comes to believe it is haunted.
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, it stands seven stories tall and contains hundreds of rooms. To the outsider it looks like a monstrous monument to a woman's madness. But Sarah is not building it for herself, she is building a prison for hundreds of ghosts.