Forty years after the Fall of Saigon, a young Vietnamese woman is among the Vietnam War's uncounted casualties. Born near fields where American planes sprayed Agent Orange, Thao lives with severe physical deformities. Halfway around the world, a woman in New York is struggling to cope after the sudden death of her famed younger sister. In the midst of her crippling depression, a friend shows Elizabeth a black-and-white photograph from a recent trip abroad. The image haunts Elizabeth. It shows Thao sitting in a wheelchair outside a shed that houses pig feed, fertilizer -- and books. Despite her disabilities, Thao had set up a makeshift library for children in her village. The photographer who captured the image had asked her,