Birth Rite (2003)

On her 18th birthday, Rebecca meets a mysterious man with magical powers. Roman, the warlock, shows her how her parents were murdered and bestows upon her the Sacred Amulet that is her birth rite. As she delves into the black arts of witchcraft, her adopted sister, Erin, fights to save her soul from the evil that has possessed her. It all ends in a showdown of good and evil as Erin and Roman battle for Rebecca.