A fictionalized account of the career of jazz singer Ruth Etting and her tempestuous marriage to gangster Marty Snyder, who helped propel her to stardom.

Georgia Garrett is sent by jealous wife Elvira Kent on an ocean cruise to masquerade as herself while she secretly stays home to catch her husband cheating. Meanwhile equally suspicious husband Michael Kent has sent a private eye on the same cruise to catch his wife cheating. Love and confusion ensues along with plenty of musical numbers.