The man used to be a psychologist but no longer practices. The women come back as multiple personalities in a woman that the author agrees to see after the woman's (patient's) sister convinces him to do so. The woman will sometimes change appearances(like a different eye color or skin color) that match the women he murdered and even speaks in Chinese at one point. I think this movie was made sometime between 1995-2005. Help! Any info would be great!