Hogwarts has always been full of secrets—but some rooms were never meant to be found again. When Y/N begins seeing impossible ink-drawn maps appearing across the castle walls, it’s dismissed as another Marauder prank. But the corridors they reveal don’t exist on any floor plan… and some of them seem to be changing in real time. As the castle starts responding only to Y/N, four reckless Gryffindors are pulled into a mystery that blurs the line between architecture and memory, history and haunting. Because Hogwarts doesn’t just hide things. It remembers them. And it has chosen someone to help it do so again.