Four kids embark on an extraordinary adventure when they are drawn into the world of Rivoli after a strange princess appears in their garden. Pleading with them to save her planet, now on the brink of destruction and with time running out, she gives them each a peculiar task to complete. On the point of despair they turn to the Uclids for help, weird and beautiful creatures that live by the river. Are they too late to save the planet and it's gentle ruler, King Alphadi? If they fail will Earth be destroyed too? An exciting read for 7-9 year olds with black and white illustrations.