 In 1918 France, Captain Flagg commands a disreputable company of Marines; his new top sergeant is his old friendly enemy, Quirt. The two men become rivals for the favors of fair innkeeper s daughter Charmaine, but the rivalry goes into reverse when Charmaine proves to be angling for a husband. When the company is ordered to the front, this comedy interlude gives way to the grim realities of war.