Arriving in Washington to help with the war effort, Benjamin Dingle (Charles Coburn), a retired, well-to-do millionaire, needs a place to stay. So when patriotic Connie Milligan (Jean Arthur) decides to rent out half her apartment, Mr. Dingle promptly moves in. Firmly believing that everybody's business is everybody's business, Mr. Dingle quickly determines that Connie should be married to a clean-cut nice young man. So he rents out half of his half to Joe Carter (Joel McCrea), an Army sergeant who most certainly fills the bill. But when the newspapers get wind of their "scandalous" living arrangement, it's up to Mr. Dingle to save careers, reputations and a budding romance, in this delightful screwball comedy.