It's the day of the Famouse Fjord Race, a miceking sailing competition. Geronimo Stiltonord isn't competing, since he gets seasick ... but then he's dragged into a boat! Just when he thinks things can't get worse, the terrible vilekings appear -- and so do the evil dragons. Squeak! Will his team stay afloat?
Miceking chief Sven the Shouter has only one goal: to transform Geronimo Stiltonord into a he-mouse. To prove his worth, Geronimo must pull out a tooth from a dragon's mouth! Shivering squids! And to get to the dragons, Geronimo must ford icy rivers and face scary creatures. Will he ever earn his miceking helmet?
Geronimo's cousin Trap has been captured by Gobbler the Putrid, the king of the dragons! If Geronimo can deliver the Crown of the Seven Rubies, Gobler will release Trap. Can Geronimo return the crown safely?
The micekings are in a panic. The village's best cook, Mousehilde, is ill--and until she recovers, there's no stew to eat! Geronimo Stiltonord and friends depart immediately in search of a cure for her. But on the way, they end up snout-to-snout with terrifying dragons! Can they make it back with their fur intact?