The story begins with a narrator explaining a case study of "aquamania" (obsession with boats and boating), with Goofy (called "Mr. X" in this short) as the subject. Then the story switches to Goofy and his son on a boating trip, inadvertently entering a water skiing race. In the process, Goofy meets up with an unfortunate octopus that joins him in the race, and they accidentally take an unwanted spin on a roller coaster at a waterside amusement park which plays the song ''Sailing, Sailing''. Goofy wins the race.