Lena Carter thought she had found a cheap apartment and a fresh start. Instead, she found something waiting inside the walls. At first, it is only a sound. A slow, steady breathing that should not exist. Then it begins to respond. It listens. It learns. It follows. As the nights grow longer, the presence becomes more than noise. It imitates. It adapts. It tries to become something human. Trapped in a building where every wall hides the same unnatural force, Lena realizes the truth too late. This is not just in the structure. It is not contained. And once it knows you are listening, it does not stop. It does not forget. It does not stay behind. Something is breathing in the walls, and it is getting closer.
