Sgt. Rusty Curtis of the U.S. Cavalry is unhappy about the Army's plan to replace horses with tanks so, after a medical discharge, he tries to buy his old military mount Sireson.
In Madrid, Spain, at the end of the 19th century, the young and reckless Basilio seems to be the only person who perceives the spectral presence of Professor Robinsón de Mantua, who begs him to take care of his niece Inés, because she is in grave danger.
Muggs and Glimpy, two East Side Kids in the army, return to their neighborhood, supposedly on furlough; actually, Muggs has been honorably discharged with a physical defect, but he tells no one of this.
When Bigshot Jones gives his unnamed dog to the All-For-One Club, Buckwheat quickly names the canine "Smallpox", inadvertently causing a city-wide panic.
A manufacturer and an impresario (who has promised some young people he will stage their show) are twin brothers causes a lot of confusion when the manufacturer is mistaken for his no-money brother.
Jimmy O'Brien (Robert Lowery)and Sammy Rubin (Sidney Miller), write jingle commercials for radio, and meet Mary Adams (Dona Drake), who wants to break into radio as a soloist for a band.
Having been falsely court marshaled for cowardice and sentenced to prison by the Army, Jed Kilton escapes and heads to Nevada Springs to see his kid brother.