In 1986, twenty-year-old Christopher Knight left his home in Massachusetts, drove to Maine, and disappeared into the woods. He would not have a conversation with another human being until nearly three decades later, when he was arrested for stealing food. Living in a tent even in winter, he had survived by his wits and courage, developing ingenious ways to store edibles and water, and stave off frostbite during the harsh winters. A riveting story of survival asking fundamental questions.