Maud Barhyte visits Paris with her fiancé, Gerald Welden, and her father. Sally Malakoff, Welden's childhood sweetheart whose marriage to the Duke Malakoff was arranged by her ambitious and title-hungry mother, entertains the three as her guests. By a series of misunderstandings Sally disrupts relations between Welden and his fiancée, causing Maud to return to America. Sally divorces the duke, and Welden, thinking Maud no longer loves him, marries Sally. Later, Welden discovers Sally's maneuverings and denounces her. Now an unhappy drug addict, Sally commits suicide, sending confessions to Maud exonerating Welden, already imprisoned on suspicion of murdering his wife. Maud presents the papers to police authorities, freeing Welden.—AFI