Victor Florescu is a talented, Brussels-based composer of serious music under the tutelage of respected Professor Bertier at the Music Conservatory. He is hoping to have his yet uncompleted operetta, "The Cat and the Fiddle", produced by famed impresario, Jules Daudet. Victor's focus in life changes when he meets Shirley Sheridan, a New Yorker just arrived in Brussels, she who moves into the pensione next to his own. He falls in love at first sight with her. She is also a composer - of the type of music more often heard in Tin Pan Alley - and is hoping to study with Professor Bertier. But it is Victor who helps her with her music. She also catches the attention of Daudet, who publishes her music although he is more interested in her as a woman. Regardless, she becomes rich and famous, and is required to move to Paris. In the short term, Victor, who moves to Paris with her, is more than willing to forgo his own musical aspirations to help her. But Victor is forced to choose between completing his operetta and being with Shirley, which may be all the more difficult a decision with Daudet waiting in the wings to be the one and only man in Shirley's life.