 While in New York to select her coronation wardrobe, Princess Ann (Jo Morrow) is photographed dancing with Riff Manton (Jack Jones), son of impoverished producer George Manton (Brian Donlevy). A dress designer, Balenkov (Fritz Feld), gives Riff a large commission when Princess Ann buys her wardrobe from him and Riff uses the money to help his father produce a hit show, a Juke Box Jamboree.