Geronimo Stilton, publisher of "The Rodent's Gazette" in New Mouse City, travels with his friends to the Ratlapagos Islands in search of treasure, and soon begin to suspect they are not the only ones involved in the quest.
Geronimo Stilton and his family travel to Penny Pincher Castle to visit his uncle, Samuel S. Stingysnout, and tries to uncover who, or what, is behind the creepy occurrences that have been taking place at the castle.
Geronimo Stilton receives a crystal figurine of a boat as a gift from his crush Petunia Pretty Paws, and when he discovers a mysterious message inside the gift asking for help in Italy, he immediately travels to Venice to save the day.
When Geronimo agrees to be a caddie for his grandfather in a golf tournament, he and Special Agent OOK team up to prevent the theft of the Super Mouse Cup.
Geronimo Stilton and friends travel back in time to Ancient Egypt to stop the Pirate Cats from coercing the Pharaoh into changing the face of the Sphinx from a man to a cat.