The citizens of "Cheesecago" are defenceless against "Al Catone's" mobsters until a few brave federal agents from the "Federal Mousehole of Investigation" headed by "Elliot Mouse" dare to take on the gangsters. In spite of their rivalry and continuous fights, they control gambling, shows, races and every business in town. They charge poor people and terrified traders with high taxes; they rob, and kidnap, but their biggest racket is in confiscating cheese and then deal with it illegally so that it fetches very high prices, often causing Cheesecago citizens to get ripped off.