Gunner and Bucker are pals who work as riveters. Whenever Bucker gets the urge to marry, which is often, Gunner will hit on his girl to see if she is true or not. So far, Gunner has not failed. But one night, while Gunner is in jail, Bucker meets Mary, a tough dame with a line. He falls for her, and she falls for his dough. But Mary is already a gal pal of Gunner, and no two know about the third one. The trouble starts when the triangle is revealed too late.