James MacDonald, familiarly known as "Slim Jim," who prefers to make a livelihood by stealth rather than by honest endeavor, leaves his wife and young son one evening, and with the assistance of a "pal" succeeds in fleecing a stranger at "Three Card Monte" for a considerable sum.

A detective sets out to nab Notorious Nora, the tough female leader of a gang whose headquarters is in a dangerous speakeasy. He decides to infiltrate her gang in order to get the goods on her, but things don't turn out exactly the way he expected them to.