Richard "The Imp" Audaine is a clever but dissolute orphan whose guardian and friends are trying to lead him from the path of ruin and back to his senses.

The Girl Who Doesn't Know is a 1916 American silent film directed by Charles Bartlett.

Inez Valenti is the niece of Grant Thorne, who runs a gambling house. She acts as a lure for her uncle's den. Barry King becomes infatuated with her, and this gives her a violent aversion to the life she has been living "behind closed doors."

Beth Coventry, society favorite and ward of a wealthy aunt, is beloved by three men: rich broker Philip Murdock; Marquis de Tourville, a polished, brilliant social lion; and poor but promising young banker John Langton.

Geraldine, the daughter of a wealthy New Yorker, is in Hungary and about to return to the United States after an absence of seven years. As a farewell, a masked ball is given in her honor at the American Embassy. Count Carlos Kinski, a distinguished young nobleman, is one of the guests and catches a momentary glimpse of her face. He falls in love with her at once and tries in vain to ascertain her identity.

Ludwig "Old Dutch" Streusand and his daughter Violet live in New York, and after years of hard study and labor Old Dutch completes his invention: the "teloptophone," a device which, when attached to a telephone, enables the speaker to see the party at the other end of the wire.