Jack La Salle marries South American heiress Blanquetta Del Castillo, and the two settle into a happy life in New York City. Following the birth of their son, Jack, Jr., however, Jack becomes involved in an affair with the notorious Josie Sabel and thereafter ignores his wife. Outraged upon learning that Jack has taken their son to Josie's apartment, Blanquetta files for divorce, the court finally ruling that the boy must live with each parent for a portion of the year. As the time of little Jack's departure from his father approaches, Jack, Sr. declares that he will never return the boy to his mother, whereupon the tortured Blanquetta shoots and kills her faithless husband.
During World War I, John Stevens invents an anti-submarine device, but the plans are stolen by two German spies, the Baron von Wiederholtz and Madame Elsa, who flee to a New York hotel. Stevens' daughter Alice pursues the spies hoping to retrieve the plans.
Seventeen year old William Sylvanus Baxter has fallen madly in love with young coquette, Lola Pratt. After spending all of his money on the fickle girl, she runs off with an older man. William now heartbroken, contemplates suicide, until a friend from childhood, May Parcher, pays a visit and William decides to fall in love with her.
