Biff Williams, an iron riveter with a weakness for women, falls for the blandishments of glamorous Lynn Crawford, a decoy for racketeers who have an option on property they intend to sell before the option expires. She induces Biff to help sell lots to workingmen at cost, and he involves his pal Danny Madden, who lives with him in Mom Whalen's rooming house. But Biff overtakes the racketeers before their train leaves, returns the money to his fellow workers, and finds romance with Mimi, whom he previously bypassed for the blonde.