Mickey the mail pilot is entrusted with a chest of money. He battles rain and snow, but his biggest battle is against Pete, who has a plane equipped with a machine gun and a harpoon cannon. Mickey's plane quickly loses its wings and propeller to Pete's armaments, but he improvises a helicopter blade with a clothes-drying rack, then, when that gives way, a replacement prop from a windmill. At this point, Pete harpoons him, and Mickey drags Pete through a bell tower, demolishing Pete's plane. Mickey delivers the money to Minnie and brings Pete to the authorities.
At around the same time the short was originally released, the Mickey Mouse comic strip published a storyline based on the cartoon, which ran from February 27 through June 10.