So much is going on. McGonagall reminds Harry that he is supposed to be finding something and Harry takes off to find the diadem. He tracks down the ghost of Ravenclaw, which I didn't even think of, and finds out that the Diadem is indeed the Horcrux. Harry also remembers seeing the Diadem in the Room_of_Requirement.Hidden_Things_Room which I also wouldn't have thought of even though it was right there in book six.
Ron and Hermione show up after their trip to the CoS where they picked basilisk fangs and Hermione destroyed the cup. I would have thought the basilisk vemon would have dried up long ago, but it's a magical creature so I can accept that. They all head into Room_of_Requirement.Neville's_Refugee_Camp and run into Ginny, Gran, and Tonks. Ginny is all too happy to leave the room. Tonks takes off to find Lupin and Gran takes off to join the fight. Gran is so taking down Bellatrix which is awesome.
Harry, Ron, and Hermione go into the Room_of_Requirement.Hidden_Things_Room. Initially I wondered how Tom Riddle couldn't have realized that other people had hidden stuff in the room as well, but I can see him thinking the room also generated junk to hide the Diadem in. There's furniture and stuff in there which I doubt that loads of students are hiding, and there just seems to be way too much stuff to account for even generations of students. Only a handful of students would likely know about the room in any given year. Of course the furniture may be from Filch who I think knows about the room, but for him it is a place to get rid of junk. In any event, I can buy Tom being arrogant enough to think the other junk was generated just for him.
Ok, the events go on. Crab, Goyle, and Draco turn up and badly bungle an attempt to capture Harry. Crab lets loose the fiend fire and all the hidden junk goes away along with Crab. Pretty horrible way to go really. In and unexpected turn of events, it turns out that Crab destroyed the Horcrux. Just the snake left and if my suspicions are correct, Harry himself.
Meanwhile, Ginny is shooting spells out the window, Tonks takes off after Lupin, Aberforth is leading some students, and they have just run into Percy and Fred dueling with death eaters. I'm looking forward to my next commute.
Oh, Ron and Hermione also started to make out until Harry pointed out there was still a battle going on all around them. That had been coming for a very long time. Funny it was Ron worrying about evacuating the elves that finally got them over the hump though. Harry's exasperation was pretty funny as well.