This is a story of injury in the midst of exuberant good health, followed by a progressively darkening journey. The writer experiences a period of isolation from normal life by his hospitalization, isolation from a part of his body by neurosensory damage to the injured leg, isolation from the security of medical colleagues by their insensitivity to his anguish. Sacks reaches a psychological nadir before beginning his return. He chronicles, retrospectively, the stages of this trip. As in the classical journey myths, the traveler returns with new insight and an altered vision of the meaning of disease.