Two sailors with a rivalry over chasing women become friends. But when one decides to finally settle down, will this mysterious young woman come between them?

U.S. Marine sergeants Quirt and Flagg are inveterate romantic rivals on peacetime assignments in China and the Philippines. In 1917, W.W. I brings them to France, where Flagg, now a captain, takes up with flirtatious Charmaine, inn-keeper's daughter. Of course, Quirt has to arrive and spoil his fun. But the harsh realities of war and the threat of a shotgun marriage give the two men a common cause...