 One night socialite banker Baron Cassini attends the stage show of Eugene Charlier, who resembles him and imitates him in his act. The Baron is attracted to Charlier s jealous stage partner Mimi, while Eugene has similar ideas about Baroness Genevieve. When financial reverses lead to the Baron s disappearance, his frantic partners enlist Charlier to impersonate him; Mimi picks that night to take the Baron up on his invitation; and that s just the beginning...