Venturing to New York to study music, Mary Vance makes the acquaintance of a girl posing as a student and through her is drawn into questionable society where she apparently becomes a victim in the white slave traffic. One day, Mary's brother John has a vision in which his dead mother appears and tells her son that his sister is in danger. Alarmed, John goes to New York where he discovers that his sister has disappeared. Suspecting that profligate womanizer Justin Lord may be responsible for his sister's disappearance, Tom kidnaps Lord's daughter Marion in revenge. Soon after, Mary is brought home by her fiancé Tom and explains that she had been in hiding, fearful that Lord had killed himself when he tripped and fell during a seduction attempt. The mystery satisfactorily explained, Lord reforms and John realizes that he has fallen in love with Marion.