It Could Only Happen To Me

During the final battle Hermione finds a Time-turner and decides to keep it. Things go horribly wrong when she is blown out of Hogwarts and two Death Eaters try to kidnap her. Oliver Wood saves her but the Time-turner is hit with two stray curses and they wake up in the time of the Marauders. Can our duo keep history from repeating itself or is it set in stone? AU. Sorry no lemons!