IN THE VAST SPACE, A CHEESE-SHAPED SPACESHIP RACES AMONG THE GALAXIES IN SEARCH OF NEW PLANETS AND STRANGE ALIENS! IT IS THE TOP GALAXY, THE SPACESHIP OF THE COSMICE MICE, THE FEARLESS MICE OF SPACE, WHO TRAVEL THE UNIVERSE WITH THEIR CAPTAIN, THE UNIQUE GERONIMO STILTONIX! An alarm sounds on the Top Galaxy: they have run out of fuel supplies! Fortunately, a group of mysterious pink aliens claims to have plenty of fuel and can give it to them. However, things are not exactly as they seem... The brave Cosmic Mice plow through space with the Top Galaxy, a mouse-tastic spaceship shaped like a slice of cheese. Here the crew has all the necessary comforts: luxurious cabins, restaurants, greenhouses for growing plants, libraries, theaters, amusement parks, gyms, sports fields, and even a biosphere that reproduces various natural environments!