A mysterious thief has stolen the prosperous Happy Valley's most prized possession: the musical Singing Harp. Can Mickey, Donald, and Goofy find the answer in the irritable Willie the Giant's magnificent castle up in the blue sky?

Donald, Mickey, and Pluto climb the Alps. While up top, Donald has a run-in with a mountain goat over some edelweiss, Mickey has a row with an eagle over its eggs; one of them hatches, and gives Pluto some trouble (as does the grog a Saint Bernard gives him when he falls into a snowbank).

Mickey buys a boat kit, and enlists Goofy and Donald to help assemble it. The plans say, "so simple a child could do it", so of course, they have their share of troubles. But before long, they're ready to launch the Queen Minnie, with appropriate fanfare, at which time, all the collapsible parts collapse.

It's time to laugh like crazy as Mickey, Goofy and Donald fight against raging gears, twisted springs, deafening bells and a sleeping stork. Watch them reach new heights of humor as their valiant efforts to clean a bell tower turn into a real circus!

Mickey, Donald, Goofy, and Pluto experience all that Hawaii has to offer. Donald tries hula dancing, Pluto explores the beach and Goofy takes up surfing!