Presents three stories about the adventures of the mouse journalist in which he goes on a rescue mission to a land of vampire bats, is attacked by a ship of pirate cats, and takes a vacation only to find himself rooming with Gerbil Scouts.

Geronimo Stilton gets caught up in the World Karate Championships, thanks to the efforts of Bruce Hyena and Piccolo Tao, Bruce's super-sporty cousin. Geronimo only has a week to become real champion material! Will Geronimo manage to overcome his fears in order to win the competition?