Radio baritone Joe Morrison was being groomed for stardom by Paramount when he was top-billed in One Hour Late. Morrison is cast as shipping clerk Eddie Blake, whose girlfriend Betty Dunn (Helen Twelvetrees) is secretary to big boss Stephen Barclay (Conrad Nagel). A trusting soul, Betty sees nothing wrong in accepting Barclay's invitation to visit his home for the weekend. But Eddie suspects the worst and tags along to make sure that Betty's virtue remains intact. As it happens, Eddie's fears are groundless -- as are those of Barclay's wife Ellen (Gail Patrick), who was poised to walk out on her husband at the first sign of extramarital hanky-panky. The script contrives to have a radio station located in the building where Eddie works, permitting Joe Morrison to croon a medley of his hit "The Last Roundup."