Far in the future and deep inside the Earth, the people of the Great Mall of Nemotex teach their children to live in fear of the world above them. A party of young rebels escapes Nemotex's oppressive boredom and flees to the Surface in search of legendary creatures called Trees. Through their encounters with bizarre characters, they learn how the Surface became a blighted desert. The discovery of one of the last trees inspires their determination to reclaim this lost paradise. This sci-fi fantasy makes its environmental message with humor and a wildly inventive plot.