When a marauder destroys the underground sanctuary that Eva Nine was raised in by the robot Muthr, the twelve-year-year-old girl is forced to flee aboveground. Eva Nine is searching for anyone else like her: She knows that other humans exist because of an item she treasures--a scrap of cardboard on which is depicted a young girl, an adult, and a robot, with the strange word, "WondLa."

Tony DiTerlizzi honors traditional children's literature in this totally original space-age adventure--one that is as complex as an alien planet, but as simple as a child's wish for a place to belong.