Heir to a Balkan throne, Prince Nicholai falls in love with an American vocalist who is touring with an operetta company in Europe. When he makes known his intention to renounce his heritage and marry Mary Lou, his mother has him locked up and orders Mary Lou back to the United States.
Estrada, the chief government official of the region, has put a price on the head of José Savedra for causing the local people to rebel against his tax collectors. Dancer Rosario Montes also thinks that the tax levied against her "Fandango Café" is excessive and is not inclined to pay.
In Spain, a girl awaits the return of her lover, an officer in the army.
