Harry Potter and the Rediscovery of Hogwarts

What the students of Hogwarts (or anyone else for that matter) didn't know was that all this time, Voldemort had been keeping one extra Horcrux hidden in the best possible hiding place should all his plans fail. Harry is brought back to Hogwarts, disguised as the new Transfiguration teacher, to destroy the last Horcrux once and for all.