Mickey Mouse is hosting a circus featuring Donald Duck and a trio of sea lions.
Children from all over come to see the circus.
After Mickey introduces the performers, the show starts.
Donald enters the ring only to be stampeded by the sea lions and a young sea lion pup.
The first act is juggling, in which the sea lions and Donald juggle balls that land on their noses.
When the stunt is finished, the sea lions beg to be fed, throwing their balls at Donald and pointing to their mouths.
Before Donald can feed the last sea lion, the pup intervenes and steals the fish.
The resulting tug-of-war ends in the sea lions fighting over the fish.
The next act is playing the organ pipe, but the sea lion can't do it right.
The pup interferes and plays the tune "Yankee Doodle" instead, but the crowd cheers anyway.
The pup distracts Donald to the point where Donald loses his temper, tries to attack the pup, and gets stuck in a drum.
Donald regains control by driving away the sea lions with his pistol.