[6] James Cagney stars as a career con artist who keeps trying to prove his worth to his girlfriend (Mary Brian) and her mother (Ruth Donnelly) through a series of promotional scams. From a rigged dance marathon and a bogus ocean pier treasure hunt, to a fat-reducing cream and a grapefruit-growing buy-in, Cagney’s character gets into one jam after another, all while his would-be mother-in-law’s …