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. The jury, moved by Blanquetta's desire to love and protect her son, ultimately acquits her.