Voldemort succeeded in acquiring the Philosopher's Stone leaving Lily's sacrifice unaffected by his revival. In a last ditch effort to escape his fate Voldemort resorts to an esoteric ritual that rends Harry from the Universe. He awakens to an entirely different conflict with enemies turned ally, friends returned from the dead, and a pantheon of new players.
Voldemort's return to power was delayed much longer; till after Harry graduated from Hogwarts and becomes an auror. An unusual magical artifact is found and the ministry launches an investigation to find any others of its kind. As the investigation digs up hints of a terrifying plot, it becomes a race to find the other artifacts before their old enemy's plan can come to fruition.
Harry was left with more than just a scar that night. As he discovers the world of magic he has to deal with the consequences of being made into a living horcrux; both the good and bad. Luckily he has a jovial old wizard to guide him through his treacherous journey.