Mickey courts Minnie in the Gay Nineties: they take in a vaudeville show and go for a drive in his horseless carriage, to the strains of "While Strolling Through the Park" and "In the Good Old Summertime". Goofy rides by on a penny-farthing bicycle, and the whole Duck family rides by on a bicycle built for five.
Based on the timeless adventures of "Jack and the Beanstalk," Mickey, Donald and Goofy climb a fantastic beanstalk up into the sky to a place where everything is huge -- the food, the castle and the fearsome giant named Willy who guards a beautiful golden harp! Will Mickey and his friends outwit the giant and make it safely back home?
Mickey is trying to lead a concert of The William Tell Overture, but he's continually disrupted by ice cream vendor Donald, who uses a seemingly endless supply of flutes to play Turkey in the Straw instead. After Donald gives up, a bee comes along and causes his own havoc. The band then reaches the Storm sequence, and the weather also starts to pick up; a tornado comes along, but they keep playing.
Mickey guest-directs a radio orchestra. The sponsor loves the rehearsal, but come the actual performance, Goofy drops all the instruments under an elevator, so they sound like toys. The sponsor hates it, but the audience loves it anyway.
It's the 1890's, and Donald is riding his penny-farthing bicycle to see Daisy when Chip 'n Dale make fun of him. It quickly escalates into a full-fledged war between Donald and the chipmunks.
Goofy's in the driver's seat, Mickey's in the kitchen, and Donald's in bed in Mickey's high-tech house trailer. When Goofy comes back to eat breakfast, leaving the car on autopilot, it takes them onto a dangerous closed mountain road. When Goofy realizes this, he accidentally unhooks the trailer, sending it on a perilous route. They come very close to disaster several times, while the oblivious Goofy drives on and hooks back up to them.
The gang throws Mickey a surprise birthday party; his present is an electric organ, which Minnie plays while Mickey does a jazzy dance. Goofy bakes the cake, but keeps having trouble with it falling. The gang does a conga line to a Latin tune.
Mickey, Minnie, Horace Horsecollar, and Clarabelle Cow go on a musical wagon ride until Peg-Leg Pete tries to run them off the road.