Dagwood Bumstead wants to use the two weeks in which his company is being reorganized to go on vacation, but his wife Blondie would rather spend the money on repainting their house. When Blondie sends Dagwood to the bank to make the last payment on the house, Dagwood gets into a fight with the grocer and is thoroughly thrashed. Dagwood is then informed by the nearby Army Reserve recruiting sergeant that the Army could quickly whip him into shape. When Dagwood protests that he has a job, the sergeant explains that he would serve on the weekends, and could be joined by his family, and Dagwood is convinced to sign up. Then, after making his last mortgage payment at the bank, he loudly discusses his plans with the bank clerk, and is overheard by Marty Greer, who claims to be a real estate salesman. Greer tricks Dagwood into revealing his address and then offers to sell the house, for four times its purchase price, while Dagwood is away over the weekend. After his first day at Fort McCleod, Danny Gateson, the son of Dagwood's drill sergeant, takes the hapless Dagwood in charge. That night, Dagwood is too tired to eat, but his sleep is disturbed by his roommate's snoring, and later, he dreams that Daisy, his dog, rescues him from death during a war. On Sunday, the family, accompanied by Mary Reynolds, who works with Dagwood, travels to the camp to visit Dagwood. As soon as they leave, Greer, together with a couple pretending to be the Bumsteads, sells the house for cash to Mr. and Mrs. Richard Rogers. At the camp, meanwhile, Blondie chases Daisy across a rifle range and barely misses being shot. Then Dagwood takes Blondie for a ride in a tank that careens out of control until it finally runs out of gas. When the Bumsteads return home, the Rogerses have already moved in. Blondie quickly learns what happened and devises a plan to get the Rogerses' money back. Using a friend's empty house, Blondie sets a trap for Greer and his accomplices. The police then arrest the crooks and recover the money. Later, a newly fit Dagwood beats up the unfriendly grocer.