Head railroad man Dan is as ugly as he is honorable. When he spots a drifter who'd hopped a freight held up by a landslide, Dan offers the man a job; then he finds the man was a railroader, too, and takes him under his wing. Engaged to Mary, Dan doesn't notice the growing attraction between his protégé and his intended but focuses instead on running the railroad.
Bill is a hot shot dancer who partners with Jazzbo, until he sees Molly at the dance. He enters the Waltz with Molly and wins first prize - and they wind up being married that same night. Now they are free of their parents nagging and their own bosses. 24 hours - no dancing as in-laws are visiting. 24 days - the Apartment is finished so off to the Hoffman's Parisian Dance Palace. Molly can only dance the Waltz and not the hot new jazz dance so she leaves and Bill follows. They are both unhappy, Bill has two left feet when it comes to romance.
Bob Naughton and Eddie Connolly are identical-twin brothers that were separated in infancy. Bob is raised by a rich lawyer, has all the advantages, but is a drunk with no moral character. Eddie is a pianist in a speak-easy but a man of high character. Bob commits a murder and Eddie is blamed and faces life in prison.
Pompous J. Piedmont Mumblethunder greets his nephew from Scotland who arrives in kilts. He is immediately taken to a tailor for a pair of proper pants.