Meet Geronimo Stiltonix:He is a spacemouse - the Geronimo Stilton of a parallel universe! He is captain of the spaceship MouseStar 1. While flying through the cosmos he visits distant planets and meets crazy aliens. His adventures are out of this world!Geronimo Stiltonix and his crew head to planet Jurassix to warn its inhabitants of a giant comet heading straght toward them! But the creatures there turn out to be ferocious dinosaur-like beasts ... who like to eat rodents. Squeak! Can the spacemice save these aliens and still make it out alive?