The daughter of a Brussels restaurant proprietor prefers the company of a young man from Paris, to that of her compatriots.

Barnes, the mate of the 'Portland', is the object of the hate of the whole ship's crew. His mistress is murdered shortly before the departure and suspicion naturally falls on him. Some time later, Jeff Cooper, the skipper, falls to his death in the middle of the night. Once again Barnes is suspected and the mate has to resort to force to maintain his authority on board. During the stopover, Barnes is interrogated and finally cleared. He is even appointed captain of the 'Portland' in replacement of Jeff and can marry his best friend's daughter.

This French musical comedy was based on the stage play Mademoiselle Mozart, written by Yvan Noe, who also directed and produced the screen version. Danielle Darrieux plays Denise, the owner of a music shop that is facing closure. Wealthy young Maxime (Pierre Mingand) falls in love with Denise but knows full well that she despises rich folks and would refuse to accept his charity. Thus, Maxime arranges to secretly buy the store then takes a job with the establishment as a humble sheet-music salesman. When Denise finds out that her new employee is actually her boss, she is furious, but rest assured that Love Will Find a Way. The lovely Danielle Darrieux is permitted to sing on several occasions, which she does enthusiastically if not altogether expertly.