Harry Potter & the Half Blood Prince SPOILER ALERT!
Chapter Fifteen: The Unbreakable Vow
Synopsis
A transfiguration class activity stirs up some things between Hermione and Ron. Hermione storms out and is comforted by an unlikely friend. Hermione tells Harry to be careful of love potions.
Harry asks Luna to go with him to Slughorn's Christmas Party. Hermione invites one of Ron's rivals to go to the party with her.
Draco sneaks in Slughorn's Christmas Party. Harry eavesdrops on Snape and Draco discussing a plan which makes him even more suspicious of both of them.
Nuninu ninu ninu ninu ninu ninu ninu...
Why does it seem like Snape actually does not know what Draco is set to do?