Arthur has vanished, or so his family thinks. If they only knew that he is in the back garden, where he has been shrunk into the world of the Minimoys. It is a world of danger and excitement, where Arthur, helped by the fiery Princess Selenia and her mischievous brother Betameche, has a difficult quest: he must rescue his grandfather, find lost treasure and save the kingdom of the Minimoys. But the answer to his quest lies deep within the garden at Necropolis, a forbidden city ruled by the evil wizard Maltazard. And to reach it, Arthur must cross a vast world of fierce battles and terrible monsters. And once you he has found the forbidden city... will he ever return?