- Harry is transported into a scene in Hogwarts castle. There he sees a young boy watching as another student is taken down the stairs on the stretcher. She's dead.
- Dumbledore calls to the boy from the top of the stairs. This is Tom Riddle and Harry is watching his memory from fifty years ago.
- Tom asks Dumbledore if they're really going to close the school. Tom doesn't have a place to go home to so he's concerned. What if the person responsible for that girl's death was caught? Then no one would have to head home, right?
- This is kind of suspicious behavior so Dumbledore asks Tom if there's anything he'd like to confess.
- Naw, I'm good, Tom tells him.
- Harry follows Tom as he heads off down the hall. Tom opens a door to reveal a young Hagrid in the room with a box.
- Tom tells Hagrid that he's going to have to turn him in. Plus the thing in the box is going to have to die.
- Hagrid protests that his pet Aragog didn't kill anyone but Tom is not having it. He blasts open the box and a huge spider escapes and rushes out the door and down the hall.
- Tom stops Hagrid from going after the spider. He tells Hagrid that he'll be expelled for this. Ah, so that explains why Hagrid can't do magic.
- Harry pops out of the diary in a flash of light to ponder everything he's seen.