During the time of Lyndon Johnson's presidency, Herbie Gneiss is forced to leave college to get a job. His income from the Kant-Brake toy factory, which manufactures military toys for children, keeps his chocolate-loving mother from starvation. Mr. Gibbon, a patriotic veteran of three wars, also works at Kant-Brake. When Herbie is drafted, Mr. Gibbon falls in love with Herbie's mother and they move in together at Miss Ball's rooming house. Since Herbie is fighting for his country, Mr. Gibbon feels that he, too, should do something for his country and convinces Miss Ball and Mrs. Gneiss to join him in the venture. In the name of patriotism, they decide to rob the Mount Holly Trust Company because it is managed by a small dark man who is probably a communist.