Chapter 15 Summary

Filch immediately takes Harry and Hermione down to Professor McGonagall's study. They assume that they are in very serious trouble for being out of their rooms and in the Astronomy tower after midnight. McGonagall enters her study with Neville in tow; she has found him out of his dorm as well. He was looking for Harry and Hermione to warn them about Draco Malfoy trying to get them expelled.

McGonagall takes 50 points each from Gryffindor for their escapades. This puts Gryffindor in last place in the competition for top school house. The rest of their house is very angry with them for this indiscretion. They are also to serve detention with Filch. Malfoy who was also out of his room trying to catch them has to serve detention with them.

When Harry, Hermione, Neville, and Draco show up for detention with Filch, they...