25 years ago, Ian Waterman caught a virus that destroyed half his nervous system. He was left like a rag doll, with no sense of touch below the neck, and no idea of where his limbs were unless he could see them.
The doctors told him that he would never walk, feed himself, or dress himself again. Yet against all the odds, he has made an apparently miraculous recovery. How has he managed it? What does his story reveal about the extraordinary capacities of the human brain?