Kansas City Princess came at the tail end of the "gold-digger" movie cycle. The inevitable Joan Blondell plays Rosie, a saucy-eyed manicurist who takes it on the lam when she loses a diamond entrusted to her by her gangster boyfriend Dynamite (Robert Armstrong). With nary a dime between them, Rosie and her pal Marie (Glenda Farrell) charm their way onto an ocean voyage to Paris. Also on board is daffy millionaire Junior Ashcraft (Hugh Herbert) enroute to the City of Light to check out rumors that his wife has been unfaithful. Unfortunately for Rosie, Ashcraft has hired himself a bodyguard -- none other than old friend Dynamite! Our heroine manages to wriggle out of her mess by saving Ashcraft from a frame-up engineered by his divorce-minded wife and her shifty attorney (Osgood Perkins).