Wealthy Richard Covington, although aging and lonely, distresses his children, Waverly and Beatrice, by marrying a heartless seductress named Fay Hope. Because Fay's extravagant spending threatens to ruin Richard, Beatrice confronts her, which prompts Richard, who is hopelessly in love with the beautiful vampire, to order his daughter from the house.

Grace Culver's sharp tongue, has garnered her with the nicknamed "The Wasp." A spirited disagreement with her canning magnate father, John Culver, results from Grace's refusal to marry Kane Putnam, her father's business partner, and she orders her new chauffeur, Tim Purcell, to take her and her maid Miller on a drive. On their return, they are captured by Brazsos, a German spy who plans to blow up her father's munitions factory. Grace learns of the hidden tunnel Brazsos has excavated to the factory, and as Miller escapes to alert the police, Grace unties the chauffeur and leads him to the tunnel. When the bomb explodes prematurely, Grace and Tim become trapped, and facing death, they confess their mutual love. The two are rescued, after which Grace discovers that Tim actually is wealthy Yale football star Harry Cortland, a revelation that delights her father.

Twin sisters Rosetta and Lola Gelardi live happily with their aging father, Professor Gelardi, until their Sicilian village is destroyed by an earthquake. Unable to find Lola, the professor and Rosetta move to New York, where she obtains employment as a stenographer to author Aubrey Hapgood. Rosetta captivates Aubrey and his friends, but Mildred Sanders, who had hoped to win Aubrey for herself, tries to ruin Rosetta's reputation. On a drive with Aubrey, Rosetta relates her life story, whereupon Aubrey, claiming he loves her, takes her to an inn. Although he promises to marry her, she later reads of his engagement to Mildred. Rosetta shoots herself, after which Lola appears to avenge her death by causing the ruin of Aubrey's sister. Aubrey fires on Lola, but Rosetta awakens in his car and realizes that it was all a dream. While the chauffeur repairs the car, she and Aubrey walk into town to find a preacher.

Fernande de Ferney, a young French girl, has spent her time between the convent and the country home of her uncle, where she has learned to passionately love Roger, the son of the Marquise de Monclars. He marries her for her fortune, but does not value what he has so lightly won until she profits by the lesson taught in the little marionette play written by their friend, Nizerolles, and finds that men are much like marionettes.