When the Pocket Dragons use some rainbow-colored Roc eggshells, which the Wizard needed for a special spell, in a batch of rainbow cookies, they must journey to distant Mount Musgrave in search of a substitute: even rarer Gryphon egg shells. While the others argue about the best way up the mountain, Filbert sets off himself, accompanied by Gladstone the Gargoyle. Unfortunately, Gladstone's fear of heights makes their climb up Mount Musgrave even more perilous, because when Gladstone panics, he literally gets petrified - and turns to stone! Worse yet, even if Filbert and Gladstone can make it to the summit in one piece, finding the elusive egg shells may be easier said than done!