Marshovia a small European kingdom is on the brink of bankruptcy but the country may be saved if the wealthy American Crystal Radek widow of a Marshovian can be convinced to part with her money and marry the king's nephew count Danilo. Arriving to Marshovia on a visit Crystal Radek change places with her secretary Kitty. Following them to Paris Danilo has a hard time wooing the widow after meeting an attractive young woman at a nightclub the same Crystal Radek who presents herself as Fifi the chorus girl. Plot by Mattias Thuresson.