Dagwood Bumstead, a bumbling draftsman at Dithers Construction Co., asks his boss, J. C. Dithers, for a raise, but Dithers refuses him because Dagwood has been careless in handling important housing plans for client Simon Rutledge. Dithers, who is hoping that Rutledge's $100,000 loan will save his company, reprimands Dagwood and sends him home. Dagwood returns home just as the police arrive to deal with a complaint filed by a neighbor against the Bumsteads' trouble-making dog Daisy. While the police try to resolve the dispute, a newspaper reporter, who followed the police looking for a good story, learns from a neighbor that Daisy has been voted the Navy's "Pin-Up Pooch." The following day, chaos ensues at the Bumsteads' as the reporter's ensuing story about Daisy brings the dog instant fame. While neighbors and advertisers clamor for a glimpse of the celebrity dog, Dagwood's son Alexander telephones his father at work to tell him the exciting news. Unable to hear his son clearly over the noise at home, Dagwood misunderstands Alexander and concludes that Daisy has been killed, then races home. Happy to see Daisy alive, Dagwood eagerly accepts advertiser Theodore Glassby's offer to have the dog pose for his soap advertisements. One day, two men working for gangster Blackie Leonard approach Dagwood and tell him that Blackie's girlfriend Hazel saw a picture of Daisy and wants the dog for herself. When Dagwood refuses to sell Daisy, Blackie's henchmen threaten to kill him to get the dog. As Daisy's modeling career flourishes, Dagwood becomes jealous of his dog's earnings and decides to model for Glassby himself. A short time later, the gangsters return, abduct Daisy and take her to their hideout at a nightclub. Dagwood, accompanied by a group of Navy men, arrives at the nightclub in time to defeat the gangsters in a fistfight. Daisy is returned to the Bumsteads unharmed, and Rutledge, who witnessed the amazing brawl, agrees to loan Dither the money.