Dancing great Bill Williamson sees his face on the cover of Theatre World magazine and reminisces: Just back from World War I, he meets lovely singer Selina Rogers at a soldiers' ball and promises to come back to her when he "gets to be somebody." Years go by, and Bill and Selina's rising careers intersect only briefly, since Selina is unwilling to settle down. Will she ever change her mind? Concludes with a big all-star show hosted by Cab Calloway.

Jeff grows up near Basin Street in New Orleans, playing his clarinet with the dock workers. He puts together a band, the Basin Street Hot-Shots, which includes a cornet player, Memphis. They struggle to get their jazz music accepted by the cafe society of the city. Betty Lou joins their band as a singer and gets Louie to show her how to do scat singing. Memphis and Jeff both fall in love with Betty Lou.