San Francisco, 1896. A woman named Sarah Winchester — widow of William Winchester, heir to the Winchester rifle fortune — is one of the richest women in the world. She inherited $20 million in 1881 — about $600 million today. She could buy anything. She could go anywhere. She chose to stay in one room. Sarah believed she was cursed. The Winchester rifles had killed thousands of people. Sarah believed the ghosts of the dead were haunting her. A medium told her: "Buy a house. Build it night and day. Never stop building. As long as you build, you will live. The day you stop, you will die." Sarah bought a farmhouse in San Jose — 30 miles south of San Francisco. She spent the next 30 years building. She built 24 hours a day — 3 shifts of carpenters, working around the clock. She built 160 rooms. 40 staircases that lead to ceilings. 2,000 doors that open into walls. 10,000 windows. She built mazes. She built secrets. She built a house that made no sense — because the point was not to make sense. The point was to confuse the ghosts. Sarah never left the house. She never left her room — a small bedroom on the second floor, with a single window looking out over the gardens. She ate in her room. She slept in her room. She worked in her room — designing the next addition, drawing plans, writing instructions. She saw no one except her servants and her carpenters. On the night of September 4, 1922, Sarah died in her sleep. She was 83 years old. She had built for 30 years. She stopped building. She died. The medium was right. Sarah's will was shocking. She left everything to her servants. Nothing to her relatives. She said: "They visited me twice in 30 years. My servants lived with me every day. They were my family. My relatives were strangers." After Sarah's death, the house was sold. It became a tourist attraction — the Winchester Mystery House. Visitors come from all over the world to walk the staircases that lead nowhere. To open doors that open into walls. To feel the presence of a woman who built a prison to protect herself from ghosts. But here is the secret that the tour guides do not tell. In 1988 — 66 years after Sarah's death — a worker was renovating Sarah's bedroom. He pulled up the floorboards. Under the floorboards, he found a small metal box. Inside the box was a diary. Sarah's diary. The diary was not about ghosts. It was about grief. Sarah's only child had died as an infant. Her husband had died of tuberculosis. She was alone. She was rich. She was empty. The house was not for ghosts. The house was for her. She built it to keep herself busy. To keep herself from thinking. To keep herself from dying of loneliness. The last entry in the diary, written the night before she died, said: "I built 160 rooms. I am still alone. I built 2,000 doors. Not one of them leads to happiness. I built 10,000 windows. Not one of them looks out on love. I am a fool. A rich fool. A fool who built a house instead of a life." The question that Sarah wrote on the first page of her diary — the page that was hidden for 66 years — is: "If I had stopped building and started living, would I have been happier? Or would I have just died sooner? Is a long life in a cage better than a short life in the sun?"