Queen Ninon of the Balkan country Jazzmania refuses to marry Prince Otto, who starts a revolution in retaliation. Persuaded by American newspaperman Sonny Daimler to abdicate and leave the country, she flies to Monte Carlo, where she meets Jerry Langdon, and then on to the United States. Ninon's love for jazz occupies her for a time, but she returns to her troubled country, quiets the revolution, establishes a republic, and marries Jerry Langdon.