Walter Bailey and his twelve-year-old nephew Hugo are employed as the ship's mapmakers. Arriving on a beach of purple sand, the intrepid pair believe that they have found paradise ...until Walter is picked off by a giant flying rat. But with the help of some weird and wonderful talking creatures, Hugo is given a chance to save his uncle.
In their hilarious adventure, Hugo and Savage travel to the unchartered mountains of deepest Transylvania, where nothing is as it seems. With a fortune telling cat, an anxious wolf-man and some seriously angry rabbits to deal with, can Hugo rescue Uncle Walter from the clutches of the evil vampanther lord before it's too late?