Young Mary's father, the Duke of Dunnkley, is a monster in human form. This cruel scoundrel not only killed his wife, but also declared his daughter, the only witness to what happened, insane and imprisoned her in an insane asylum. However, Mary miraculously managed to escape and find shelter in the house of the noble young Duke Edward Farley, who is able to believe her, because he himself witnessed a terrible crime as a child. Gradually, friendship and trust between Mary and Edward develop into love - a passionate feeling that gives them the strength to together challenge the terrible Duke, who has announced a real hunt for the fugitive...