For the first 27 years of his life, Ildefonso lived in isolation. No, he wasn’t locked in solitary confinement or stranded on a desert island. He was born totally deaf and never even learned that there was such a thing as language. He didn’t even know that sound existed. In this episode, we speak with Susan Schaller, whose patience, perseverance and resourcefulness freed Ildefonso from his dark and incomprehensible prison.