On a stormy day Rumpus McFowl bumps into a sinister-looking man. Both lose their hats, but Donald catches the two bowlers and gives them back to their owners. When the stranger breaks into the Giltbundle mansion along with an accomplice, he wants to open the safe with the combination noted inside the bowler. However, there is written “Rumpus McFowl” – the hats were swapped. They find Rumpus and the bowlers change owners again. But the crooks are unlucky again because Duckburg celebrates the annual derby day and the stormy wind blows numerous hats into the air along with the thief’s bowler. The safe-breaker has lost the combination again. Finally Donald gives back the bowler to the stranger again, but the storm foils the robbery anew.