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.

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.

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."

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

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.

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.