It began with a single cold pane on the second floor of the abandoned Harlow house on Marigold Lane, in the late autumn of 2019. Luna had been walking home past midnight when she noticed the window was open, just a crack, letting out no light but a sound like distant breathing. Over the following weeks, she kept returning—first out of curiosity, then compulsion. The window never closed, never warmed, and the breathing grew clearer. Inside, she found no furniture, no floor, only a drop into darkness that went farther down than the house's foundations should allow. This is a story about the places that wait for us to look up, about the thresholds we mistake for ordinary architecture, and about the thing that stood behind the glass the final time she came back.