Nathan Detroit must win a bet from slick high roller Sky Masterson or Nathan's Oldest Established Permanent Floating Crap Game will be forced to fold. Nathan bets that Sky will not be able to take starchy Mission doll Sarah to Havana with him. Sarah finds the rakish Sky very resistible at first, but eventually melts and accompanies him to Cuba, while Nathan almost loses his fiancee of 14 years, the psychosomatic showgirl Miss Adelaide. In the end, the Dolls get the Guys and all ends merrily.