In Disney's take on the Alexander Dumas tale, Mickey Mouse, Donald Duck and Goofy want nothing more than to perform brave deeds on behalf of their queen (Minnie Mouse), but they're stymied by the head Musketeer, Pete. Pete secretly wants to get rid of the queen, so he appoints Mickey and his bumbling friends as guardians to Minnie, thinking such a maneuver will ensure his scheme's success. The score features songs based on familiar classical melodies.
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.
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 and friends put on a revue for the orphans. Donald recites nursery rhymes, but the orphans torment him. Horace, Goofy, and Clarabelle do a dance number. Donald tries again. Clara clucks a song while Mickey plays piano (with support from an unseen orchestra). Donald returns, and the orphans finally send a parade of bricks and eggs on balloons over him and use slingshots to drop them on his head.
Mickey hosts an amateur hour radio show. Among the acts: Donald forgetting the words to "Twinkle Twinkle Little Star"; Clara Cluck singing and chasing the microphone; and Goofy with an elaborate one-man-band contraption.
Mickey leads his polo team Donald (on a mule), Goofy, The Big Bad Wolf against an all-star team: Stan Laurel, Oliver Hardy, Harpo Marx (on an ostrich), Charles Chaplin, in a game refereed by Jack Holt. Featured spectators include the Three Little Pigs with Shirley Temple, W.C. Fields, and Clarabelle Cow with Clark Gable. Game action proceeds pretty much as you might expect from this bunch of comedians.
Mickey shows off his ice-skating skills to Minnie; Goofy does some unconventional ice fishing; Donald straps skates to Pluto and laughs at his attempts to skate. Donald gets strapped to a kite and is about to be swept over a waterfall when Mickey pulls off an heroic rescue.
He's Ace Ventura: Pet Detective. Jim Carrey is on the case to find the Miami Dolphins' missing mascot and quarterback Dan Marino. He goes eyeball to eyeball with a man-eating shark, stakes out the Miami Dolphins and woos and wows the ladies. Whether he's undercover, under fire or underwater, he always gets his man… or beast!