The Dangerous Little Demon: Teddy Harmon, a society girl preoccupied with pleasure, is persuaded by her father's serious-minded secretary that she is in love with him, but meeting his family, she becomes bored and seeks the society of Gary McVeigh, a wealthy neighbor. At a gambling house, she finds her father with a dashing young widow, and later, the proprietor, though ostensibly a friend, tries to force his attentions on her and she is taken to jail in a raid. She is rescued by Gary, and the secretary, learning of her father's financial difficulties, breaks the engagement.