Perrin goes into the wolf dream, but finds no one there but a man called the Slayer who can enter it bodily to permanently kill wolves. He enters the title tower, and Hopper appears and tells him it’s impossible to leave here. And a woman Hopper can’t see, who’s holding a strange silver object, is impressed to learn he can talk to wolves and advises him the same. But she can’t stay, as telling him even this much is against the “prescripts.”
From the way the woman is described, I get the feeling readers with sharp enough memories should know who she is, but I’ve got nothing. Maybe that’s also the case with the Slayer. All this is really just setup, so for now I’m happy just waiting for what it’s leading up to.