Cheese-loving rodents across New Mouse City are behaving very strangely—and all clues point to a new, mysterious cheese that has appeared on supermarket shelves. When Geronimo tastes it himself, he feels dizzy and confused… What’s going on? With the help of his friends and family, Geronimo sets off on a wild and tasty chase to uncover the secrets of the curious cheese—before the whole city turns into cheesy zombies!