Christopher Columbus (Dom DeLuise) is crazy. Everyone knows the world is flat! But with the help of his adventure-seeking friend Pico the wood worm (Corey Feldman), Columbus sets out to prove to everyone that the world is a cube-er, it's round! But there are obstacles in Columbus' way -- besides a crew so afraid of sailing "off the edge" that they're willing to commit mutiny, and a set of troublemaking rats, Columbus and Pico have to contend with the vicious Swarm Lord (Dan Haggerty): a nasty insect monster who has taken captive the beautiful fairy Marilyn (Irene Cara). But the two friends will manage to prove their worth: not only do they find the New World, but they manage to save Marilyn, squish the Swarm Lord, and even find enough golden treasure to impress Queen Isabella (Samantha Eggar).