Blast Into The Past (слэш)

The Cage was never meant to hold a human. It was meant for one archangel, not two, and definitely not a human soul. Little by little Sam's soul was being destroyed by the torture the Cage inflicted on it. Lucifer and Michael joined together and, with their combined grace, pieced together Sam Winchester's soul and sent him out of the Cage and into the past in the hopes that he can stop this whole thing before it even starts.
Only, when Sam lands, things don't quite go so well. He's not all that sure that this isn't another torture the Cage has provided for him. He's in the past, right after Dean got out of Hell, and he's nowhere near the same man he was before. He can barely remember how to function as a human. It's going to take his family and a little help from a surprised archangel for Sam to start to recover. He doesn't have much time, though, because the apocalypse is still coming and the angels are fighting to get Lucifer free. Can one broken man manage to change the past? Or are they doomed to repeat their same mistakes over and over again?