Between Grim and Aconite

Time Turner fic A chance encounter leaves Hermione tumbling backwards into the past...straight into Marauders' era chaos. But when people are not at all who she thought they were will she let her emotions seek to change the future for the Greater Good, or is Fate unshakable no matter what or who changes along the way? Pairing: Snape/Hermione /or/ Sirius/Hermione