Darklight (2004) on Netflix

From the beginning of the world, the evil first woman, Lilith, was expelled from Paradise, becoming an immortal powerful being. A secret society, The Faith, was created to chase and destroy Lilith, who loses her memory after a battle. In the present days, when the ambitious and wicked Anders Raeborne uses an experiment trying to become immortal, he transforms in the evil Demonic, a powerful dark being that transmits a red plague with his bite and tongue. The traumatized Faith's chief agent William Shaw is assigned by their leader Prefect to bring the recollection and train Lilith to face and destroy Demoniac and bring his head to develop an antidote.