Headmaster Albus Dumbledore comes by Harry Potter's place to ask him to come with him. Harry says okay. They go to Horace Slughorn's house. Slughorn was the former professor of Potions over at the Hogwarts School of Witchcraft and Wizardry. He does not want to come back, but when Dumbledore shows Harry, he says okay. On the train to Hogwarts, Slughorn gets together his club again. Slughorn likes to take a back seat and has a lot of influence, or power. Harry is one of the most famous wizards ever and Slughorn wants to be his friend. When school starts, the first thing Slughorn does is recreate his old Slug Club, filled with people who have power or a good name.