Lone Traveler: The Slytherin Chronicles

Severus Snape is confronted by the Lone Traveler on the Eve of his ascention to Slytherin Head of House. The visiting Harry teaches him to change the course of Slytherin and all of the Magical world. All he has to do is get them to open their eyes. The major portion is almost exclusively in the viewpoint of Severus Snape. Now with Lucius Malfoy thrown in.