I do not remember too much of the beginning, but this dream was set in a old house, a boarding house and temporary home for children who were naturally attuned or talented with things magical or supernatural. The children were taught while they were there, but it wasn’t school-like teaching, more like “Since you’re here we might as well teach you a bit, if you want” tutoring.
Every year there were new people staying for a while, and older kids leaving for the last time. One of the first things new children would find out, either from the caretakers or from fellow kids, was that somewhere deep in the house’s basement, there was a secret room sealed by a mysterious spell. This secret room was rumored to be a prison for all kinds of foul ghosts, too strong to banish entirely, and too dangerous to expel from the safety of the house. So they were locked up, or so the story went.
The focus of the dream drifted around often, but there was this one girl who it foc