The whole gang is back at Hogwarts 5 years after the war to help it reopen. Harry has been in Florida for the past 5 years, not really dealing with all that happened to him. He comes back to find Draco and Hermione close friends, and the school is full of curses going off all the time like land mines. I thought this was very well written. Harry ticked me off throughout most of the story, refusing to believe Draco could be on their side, even after they started fooling around.
This was written before Order of the Phoenix, so was severely AU, different people dead, or dead for different reasons, but a really interesting take on how things might have gone.