Betty Grable and June Haver star as the Dolly sisters, who sang and danced their way into the hearts of vaudeville audiences in New York and Paris. Jenny (Grable) and Rosie (Haver) Dolly were a dancing sensation before the first World War. Shadowing their success was noted dancer-composer Harry Fox (John Payne), who carried a torch for Jenny. A romance develops between Jenny and Harry that seems unstoppable, as does Rosie's romance with department store owner Irving Netcher (Frank Latimore), but both relationships will be tested in ways none of them could have imagined.