Rewriting the Timeline

Harry Potter at 18 decided he had enough action and became an unspeakable to the shock of the wizarding world. In midst of experimenting with Time, the ministry is attacked by rogue death eaters. Caught up in the battle, the Potter luck kicked in, a domino of actions triggered. Getting hit by a rogue spell, his body is blasted backwards, the time turner he was carrying shattered, its sand scattering around him. But it wasn't just any time turner, it was an experiment he was working on. Harry's last thoughts were getting to spend time with his parents, Remus, and Sirius again. And with that, Fate puts a spin on his life once again, and he finds himself at Hogwarts looking 15. The catch? It is the Marauder's era.
*I do not own Harry Potter, this is a fanfiction using its characters*