Maia, an orphan, can't wait to reach her distant relatives a thousand miles up the Amazon. She imagines a loving family with whom she will share great adventures. Instead she finds two spiteful cousins who see the jungle as the enemy and refuse to go outdoors. But the wonders of the rainforest more than make up for the hideous twins and their parents. And when Maia meets a mysterious boy who lives alone on the wild river shores, she begins a spectacular journey to the heart of an extraordinary and beautiful new world.