- On the train home to the Weasleys' house for the holidays, Harry tells Ron about this Unbreakable Vow business he overheard.
- Meanwhile, looks like there's trouble in paradise as Ron complains about Lavender's cloying ways. That didn't take long.
- Ron explains to Harry the terms of an Unbreakable Vow: if you don't make good on it, the consequences are fatal. In that you die. Oof.