Set in the hustle and bustle of New York City in the 1920's, Guys and Dolls Jr. follows renowned gambler Nathan Detroit and his pursuits to put on the biggest crap game in town, all while authorities and his fiancee, Adelaide, breathe down his neck. When Nathan does not have enough money to secure a venue for his crap game, he turns to a fellow gambler, Sky Masterson, for help. This results in a bet that sends Sky running after Sarah Brown, a missionary at the Save A Soul Mission.