Robbie is the 12-year-old son of a wealthy businessman. He does whatever he wants regard of the consequences. When he falls over the rail of a Mediterranean cruise ship, he finds himself in the amazing underground world of Sutala. Robbie meets Lea and many of the Wonderkind who are all that remain of an ancient and powerful race. Lea introduces Robbie to the hups, the luminescent bees and a magical waterfall that changes him forever.