After struggling to become a success, Betty Miller and her all-girl orchestra finally hit pay dirt when crooner Herbie Fenton comes on board. Problems arise when Betty and her girls try to find backers to invest in Herbie and they sell 125 percent of him.
A popular band joins the army with the idea of putting on shows for troops overseas. During rehearsals, a battle erupts and the musicians must exchange their musical instruments for guns and fight.
During the movement to repeal Prohibition, Oxidontal University student editor Elmer Brown is strongly in favor. He loves the daughter of an ardent prohibitionist; by chicanery, he tries to win Gloria and sell his bottle stopper invention.