Copacabana

In New York City, Lionel Q. Devereaux and his fiancee Carmen Novarro are unsuccessfully trying to find a spot in the show business. Lionel introduces himself to Steve Hunt, who owns the famous Copacabana nightclub, as an important agent and convinces Steve to see Carmen's act. He enjoys the show and asks for something in addition. Lionel convinces Carmen to wear a veil and perform another song and introduces her to Steve as the French singer Mademoiselle Fifi. Steve hires both singers and Carmen has to change clothes and identities between her performances. When she sees Lionel flirting with a Copa Girl, Mlle. Fifi accepts the invitation to have dinner with Steve, hurting the feelings of his secretary Anne Stuart who is in love with him. The situation gets complicated and Carmen simulates an argument with Mlle. Fifi and her subsequent disappearance starts a police investigation where the prime suspect is Lionel.