In the autumn of 2004, I arrived at St. Agatha’s Vocational Institute, a crumbling Gothic pile perched on a hill above the rust-belt town of Millbrook. The building had been a convent, then a tuberculosis sanatorium, and finally a school for wayward teens like me. The halls still smelled of incense and mothballs, and the chapel at the center of the main floor had been converted into a cafeteria, but the stained-glass windows remained, casting fractured rainbows across the linoleum.
My roommate was a wiry girl named Mira, who chain-smoked on the fire escape and claimed she could taste the history in the air. ‘Sweet and rotten,’ she’d say, tapping ash into the wind. ‘Like communion wine left to spoil.’ I wrote her off as a drama queen, but I couldn’t shake the feeling that the building was watching me. The corridors creaked with the weight of old prayers, and sometimes I’d catch a flicker of movement in the corner of my eye, only to find nothing but dust motes dancing in the light.
A month in, I got my first taste of the strange. It was a Saturday night, and the dorm was nearly empty—most kids had gone home for the long Columbus Day weekend. Mira and I had stayed because my parents had forgotten to pick me up, and she’d claimed she had no one to visit. We were lying on our bunks, gossiping about the kitchen staff, when a soft shushing sound filled the room. It wasn’t a hiss or a whisper; it was a deliberate, almost maternal ‘Shhh,’ as if someone were calming a crying infant. Mira froze, her eyes wide. ‘That wasn’t you?’ she mouthed. I shook my head. The shushing came again, closer, from the corner where the old iron radiator stood. We didn’t sleep that night, and we didn’t talk about it, but I noticed Mira started sleeping with a crucifix under her pillow.
The next morning, I asked the janitor, Mr. Hargrove, about the building’s past. He was a stoop-shouldered man with a face like a crumpled newspaper, and he’d worked there since it was still a hospital. ‘You heard the shush?’ he said, leaning on his mop. ‘That’s Sister Mary Agnes. She used to soothe the patients before they passed. Died herself in this very building, in the room at the end of the corridor.’ He pointed to our dorm. ‘That was the isolation ward. She got TB from a patient and refused treatment, said she’d rather die with her flock.’ He spat into a bucket. ‘She’s still here, I reckon. Doesn’t like loud noises. Especially the giggling of girls who don’t know better.’
I tried to forget his words, but the dorm felt different now. The walls seemed to breathe, and the radiator would clank at odd hours, even though the boiler was off. One night, I woke to a cool draft and a figure standing at the foot of my bed. It was a woman in a grey habit, her face obscured by shadow, but her hand was raised as if to shush me. I opened my mouth to scream, but no sound came out. She stood there for a long minute, then faded like mist. Mira was awake, shaking. ‘Did you see her?’ I whispered. She nodded, her teeth chattering. ‘She pointed at the door,’ Mira said. ‘She wants us to leave.’
We packed our bags that night, but the heavy oak door to the dorm hall wouldn’t budge. It felt like something was pushing against it from the other side. We hammered and shouted, but no one came. Finally, exhausted, we sat down against the wall. That’s when we noticed the floorboards under the old rug were loose. We pried them up and found a narrow crawlspace, barely wide enough to squeeze through. It smelled of earth and copper. Mira went first, holding her phone’s dim light. The tunnel sloped downward, and we crawled for what felt like hours, scraping our knees on rubble. In the distance, we heard a faint shushing, as if Sister Mary Agnes were guiding us, or herding us.
The tunnel opened into a vaulted brick chamber, clearly much older than the building above. On the walls were faded paintings of saints, and in the center was a stone altar. On it lay a child’s skeleton, wrapped in a moth-eaten burial shroud. The shushing grew louder, and we saw another figure beside the altar—the nun. Her face was visible now: gaunt, with sunken eyes and lips peeled back in a rictus grin. She raised her hand again, but this time she wasn’t shushing. She was pointing at the skeleton. ‘She died for them,’ Mira whispered, her voice cracking. ‘She killed her to save the others. The plague was her fault.’
I don’t know how we made it out. We scrambled back into the tunnel, and when we emerged into the dorm, the sun was rising through the grimy windows. The door swung open easily. We left St. Agatha’s that morning, and I never returned. But sometimes, when I’m alone in a quiet room, I hear that soft shush. It’s not a warning. It’s an invitation. And I know that one day, I’ll crawl back under that floor to find out what Sister Mary Agnes wanted me to see.