A young musician invents an anti-theft device for cars, but works as a jazz conductor while waiting for his invention to be successful.
A French sleeping-car attending with an eye for the ladies hooks up with a wealthy widow and they get married. What he doesn't know is that she married him because she wants to stay in France. Complications ensue.
Three friends plan to marry their sweethearts, but when the former fiancée of one of them shows up threatening breach of promise because she's after his aristocratic title, they must think on their toes and resurrect his dead uncle, leading to comedic chaos.
