A wealthy old maid offers to be the godmother of a regiment in order to find a fiancé for her niece who must come into possession of a large inheritance the day she marries a private.

A young man realizes that his fiancée is asking the Mystery Prince for advice on the conduct of his future household. The Mystery Prince is a radio presenter adored by his listeners. To get rid of this cumbersome character, the young man makes one of his comrades pass for the presenter, who has become the worst of cads.