When Gerald is made to work more extended hours, his quarreling young children, Aleks and Sophie are left in the care of their Grand Uncle Leopold, an eccentric figure with a penchant for fun and adventure. The children and Leopold travel to a little-known, albeit very real, village called Nonsuch, where a strange malady has afflicted the inhabitants. There the children are introduced to Lady Bella, the village apothecary, who guides them towards the mythical Sultan's palace, from where they must procure the final ingredient to Bella's antidote; the Moonstone. The Sultan, a wise Mage, has also formulated his antidote but is lacking a further ingredient; Winter's Honey. An old rivalry reignites between Leopold and the Sultan, in a fit of rage the latter transforms Leopold into a block of stone, sending off the children on a quest to retrieve the Honey and thus save Leopold and the Village. Aleks and Sophie must put aside all of their petty differences and work together to save Leopold and the Village from an apparent doom.