After he's left a bit high and dry by his established partner "Nadine" (Ann Miller), acclaimed song and dance man "Hewes" (Fred Astaire) makes a rather drunken promise to their pal "Jonathan" (Peter Lawford) that her replacements are ten-a-penny. The words are barely out of his mouth when he encounters "Hannah" (Judy Garland) who's making $15 a week as a dancer on the stage in a club. She has potential, thinks he, and so he ups her wages a bit and invites her to train with him. From here on in, this plot is fairly predictable so don't expect anything remotely left-field. What we do get,…