AllMovie

Set if France during the 1700s, Gwyneth Gibby's Dark Prince stars Janet Gunn as a woman whose sister has gone missing. During her investigation she crosses paths with the notorious Marquis de Sade (Nick Mancuso). While he tempts her with his forceful sexual attitudes, he hints that he knows what happened to the missing sister. When he escapes from prison, the woman follows him and faces dark truths about her sister and herself.