Posted in France, Pvt. Hogan (Jack Lemmon) falls hard for Betty Bixby (Kathryn Grant), a nurse who happens to be a lieutenant, which means they are forbidden to fraternize due to their ranks. Always one to skirt the rules, Hogan, with the help of his friend Cpl. Bohun (Dick York), cooks up a scheme to throw a clandestine ball for all the soldiers and nurses. But the two have their work cut out for them when the authoritative Capt. Paul Lock (Ernie Kovacs) starts breathing down their necks.