Evelyn, re-examining the manor's blueprints with renewed urgency, identifies a previously overlooked 'maintenance tunnel' that connects directly to every guest's room and the central AI hub, realizing a hidden occupant has unrestricted access to everything, explaining how the killer can move unseen and unheard. From the newly identified tunnel, a faint, rhythmic scratching sound can be heard, almost like nails dragging across stone, growing louder, closer, suggesting whatever is inside is now actively moving towards their location, its presence undeniable and terrifyingly imminent.

The Man in the Walls