A LIGHT WOMAN (1920)

Young Doris Kane suspects that her fiance, Paul Evans, doesn't love her anymore. She finds out that he is now infatuated with a "vamp", Jeanne DuPre. Paul's father is appalled at his son's behavior, and devises a plan to break up the romance between his son and the vamp by making her fall for him and exposing her perfidy to his son.