Robert Young stars as a WW2 pilot named Hank, who accompanies his pal Jerry (Bill Williams, in his film debut) on a furlough. Jerry introduces his girlfriend Helen (Laraine Day) to Hank, a notorious and unrepentent womanizer. In a twinkling, Hank tries to steal Helen away from Jerry-but succeeds only after proving that he's a nice guy after all. Ann Harding, one of RKO Radio's leading star of the early 1930s, returns to her old studio to play Helen's all-knowing mother. Those Endearing Young Charms is based on a Broadway play by Edward Chodorov, originally purchased for the screen by independent producer Sam Goldwyn.