Elmer, rich society loafer, falls for Mary, but she'll have nothing to do with him until (mistakenly thinking that he's hiring a new chauffeur) he accidentally volunteers for the army. Luckily, Mary's signed up to entertain the troops. Unluckily, Elmer's sergeant likes Mary, too. And worst of all, they're all about to ship out for France.
When the Great War breaks out, brothers Roy and Monte Rutledge, each attending Oxford University, enlist with the Royal Flying Corps.
In order to use the publicity to get re-elected, a judge sentences a notorious gangster to fight in the war.
18-year-old Rosie Kaplan O'Grady was found as an abandoned baby by O'Grady, an Irish policeman, and Kaplan, a Jewish pawnbroker, and raised by them as their own. She is being courted by two men; prizefighter Terry Callahan and a rich socialite, Tommy Sinclair and has to choose between them.