In Vienna, a new jazz club featuring American trumpeter Buzzy Bellew threatens the existence of its neighbor, the Waltz Palace, run by Franz Strauss and featuring his granddaughter, singer Elsa. Smitten by Elsa, Buzzy hides his identity and association with the club -- whose owner intends to buy out the Palace property. When Elsa accidentally learns who Buzzy really is, it appears he may have to return to America alone.

Daydreaming waitress Jennie Hagen fantasizes about becoming a famous actress, while in reality she and her cook boyfriend, Orme Wilson, hope to one day own their own diner. Although Orme loves Jennie, he also has a weakness for stage stars -- so when a riverboat theatrical crew comes to their town, he is smitten by lead actress Lillian Lyons. Desperate to keep Orme, Jennie insists on going onstage to best Lillian, but is soon out of her depth.