Hermione is in love with Harry, and doesn't think she has a chance after the end of the war, so she disappears from the magical world. Somehow she ends up living next to Draco Malfoy, and they become close friends, and live together in the muggle world for years. Then there is the reunion at Hogwarts, which she comes to, surprising everyone, and explains why she left, and realises

Sometimes, not everything is as it seems. Not everything is seen, and somethings are just taken for granted. And sometimes, someone won't settle for what seems to be determined. And also - it's not a Resurrection if they weren't really dead in the first place is it? Picks up towards to end of the OotP