APARTMENT 404

I stared at the damp spot spreading across the corner of the ceiling, watching a single droplet of brownish water pool, heavy and swollen, before plummeting onto the middle of my battered laptop keyboard.

Plip.

"You've got to be kidding me," I muttered, wiping the keycap with the sleeve of my faded hoodie.

My phone buzzed against the particle-board desk, vibrating with the aggressive urgency of a final eviction notice. I didn't even need to flip it over to know what it said. My bank app had already sent three notifications that morning: Insufficient Funds. My university account was flagged for overdue tuition, and the campus housing board had officially given me forty-eight hours to clear out of the dorms.

Three hundred dollars. That was the entirety of my life savings. In a university town where a broom closet under a stairwell rented for eight hundred a month, three hundred dollars was a joke.

Which was why I was currently standing in the water-damaged lobby of Sterling Manor.

The building smelled of crushed limestone, wet wool, and ancient dust. Built in the late 1920s as a luxury hotel before being retrofitted into low-income private studios, Sterling Manor looked like a relic that had survived a fire only to be slowly digested by time. The red carpet in the lobby was worn down to gray burlap in the center, and the grand chandelier hanging from the vaulted ceiling was missing half its crystal teardrops.

"You're late, kid," a voice rasped from the dark doorway behind the reception desk.

Mr. Vance stepped into the pale bar of afternoon sunlight filtering through the grime-coated front windows. He was a tall, unnaturally thin man in his late fifties, dressed in a faded charcoal suit that looked two sizes too large for his frame. His fingers were long and yellowed at the tips, smelling faintly of cheap tobacco and brass polish.

"Traffic on campus was backed up," I lied, adjusting the strap of my heavy backpack. "I'm Julian. I called about the Studio 403 listing."

Vance’s sunken gray eyes flicked over me, taking in my worn sneakers, my frayed backpack, and the dark circles under my eyes. He didn't ask for a credit check. He didn't ask for a proof of income or a co-signer. He simply reached into his coat pocket and pulled out a manila folder, slapping it onto the counter between us.

"Two hundred and fifty a month. Utilities included. First month up front, fifty bucks security deposit," Vance said, his voice flat, like a man reciting a legal disclaimer he had spoken ten thousand times.

I blinked, taking a step back. "Two fifty? In this district? What’s the catch? Is it infested with black mold?"

"The plumbing is old. The steam pipes rattle when the furnace kicks on at midnight. And the building is old enough to have settled into its foundation, so the floors squeak," Vance said smoothly, sliding a rusted key attached to a brass tag across the wood. "Take it or leave it, Julian. I have three other desperate students coming by at four."

I looked at the brass key. 403.

It was almost too good to be true, which meant it almost certainly was. But my alternative was sleeping in my five-year-old hatchback in the middle of October.

"I'll take it," I said, reaching into my pocket and pulling out the stack of twenty-dollar bills I'd withdrawn from the ATM an hour ago.

Vance snatched the money before I could even finish counting it into his palm. His yellowed fingers flicked through the bills with terrifying speed, snapping them into a leather wallet. He pulled a single sheet of paper from the folder—the lease agreement—and shoved a cheap ballpoint pen into my hand.

"Sign at the bottom. Page two lists the house rules."

I glanced down at the paper. Most of it was standard boilerplate stuff: no sub-letting, no illegal substances, quiet hours after 10:00 PM. But halfway down the page, typed in a slightly darker, misaligned typewriter font that didn't match the rest of the document, was a single, strange sentence:

Tenant agrees not to tamper with, inspect, or investigate structural anomalies on the 4th floor, including but not limited to unlisted wall spaces.

I raised my eyebrows, holding the pen above the dotted line. "Structural anomalies? What does that mean?"

Vance didn't answer right away. He reached into his coat, pulled out a small silver pocket watch, clicked it open, and stared at the hands for a long three seconds before snapping it shut.

"The building was renovated in 1984," Vance said, his tone devoid of emotion. "Some room configurations were altered to comply with city fire codes. Do not mess with the brickwork in the hallways. And if you hear tapping from inside your wall at night... don't buy a hammer to knock back. Just ignore it."

"Ignore it?" I laughed nervously, thinking it was a dry landlord joke.

Vance didn't smile. His cold, unblinking gaze locked onto mine, dead serious. "Ignore it. Or pack your bags and leave."

A chill ran down my spine, subtle but sharp. I looked back at the lease, then at my dwindling remaining cash, and finally signed my name at the bottom: Julian Vance—no relation, thankfully, just a cruel coincidence of surnames.

"Elevator is out of service. Fourth floor is up the main stairs, turn left," Vance said, snatching the signed lease and sliding key 403 into my palm. "Welcome to Sterling Manor."

Studio 403 was smaller than my dorm room, but at least it was private.

It was a narrow rectangular room with high ceilings, a single tall window overlooking a dark alleyway, a squeaky iron twin bed, and a small kitchenette jammed into the corner. The walls were covered in thick, dark-green wallpaper peeling at the seams, revealing pale plaster beneath.

I dumped my duffel bag on the floor, kicked off my shoes, and unrolled my laptop setup on the small wooden desk near the window.

Before unpacking my clothes, my analytical side took over. As a third-year engineering student, I had a bad habit of picking apart spatial layouts whenever something didn't add up. I pulled out my phone and pulled up the public archives of the city building department, searching for Sterling Manor's historic floor plans.

It only took two minutes to find the digitized blue-prints from 1982.

I zoomed in on the fourth floor layout. The corridor was a straight line running east to west. Studio 401 was at the far left. Studio 402 next to it. Studio 403 was where I was sitting right now.

According to the 1982 blueprint, Studio 403 was supposed to be adjacent to Room 404—a large, corner apartment with a bay window facing the main street.

I stood up, walked out into the dimly lit hallway, and walked down the corridor.

Next to my door, where Room 404 should have been, there was nothing. No door frame. No apartment number. Just a smooth, unbroken stretch of dark red brick wall that ran all the way to the fire escape door at the end of the hall.

I stepped closer, raising my hand to touch the bricks. They felt strangely cold, almost icy, despite the stifling heat of the hallway radiator ten feet away.

I pulled up the updated 1985 building permit on my phone. The red ink across the official document was stamped in bold: ROOM 404 DEMOLISHED & SEALED FOLLOWING INCIDENT #84-B. SPACE CONVERTED TO STRUCTURAL SUPPORT.

"An incident," I murmured to myself, tracing the rough mortar between the bricks. "They demolished an entire apartment inside a concrete building?"

It didn't make engineering sense. You don't demolish an interior apartment in a multi-story brick structure without changing the entire load-bearing frame of the upper floors. You wall it off, maybe. But you don't erase it.

Shaking my head, I walked back into 403, locked the deadbolt, and collapsed onto the thin mattress. I was too exhausted to care about forty-year-old architectural mysteries. I had an 8:00 AM exam on structural mechanics tomorrow, and I needed sleep.

I pulled the thin blanket over my shoulders and closed my eyes.

Outside, the rain began to fall in heavy, rhythmic sheets against the glass.

Tap.

I stirred, floating in that half-conscious state between deep sleep and waking.

Tap. Tap.

My eyes snapped open. The room was pitch black, saved only by the faint, eerie yellow glow of a streetlamp bleeding through the window blinds.

I held my breath, sitting up slowly on the squeaking springs of the bed.

My phone on the nightstand lit up with a silent notification. I glanced at the glowing screen.

3:03 AM

Tap. Tap. Tap.

The sound wasn't coming from the hallway. It wasn't coming from the ceiling or the radiator.

It was coming from directly behind my bed—from inside the solid brick wall that separated my room from the unlisted space where Room 404 used to be. It was a sharp, rhythmic, metallic clicking sound. Like a heavy ring striking polished wood.

Tap. Tap. Tap.

Vance's words echoed in my mind, cold and sharp: If you hear tapping from inside your wall at night... don't buy a hammer to knock back. Just ignore it.

My heart hammered against my ribs like a trapped bird. Slowly, deliberately, I swung my legs over the side of the bed and stood up on the cold hardwood floor.

I didn't ignore it. I couldn't.

I grabbed my heavy metal flashlight from my desk, switched it on, and stepped out into the dark hallway, shielding the light with my palm.

The hallway was freezing. White mist curled from my mouth with every breath I took.

I turned left, casting the beam of light down toward the dead end where the solid brick wall stood.

I froze.

The solid brick wall was gone.

In its place, set deep into a dark wood frame that hadn't been there three hours ago, was a heavy, dark oak door. Brass studs lined its perimeter, catching the beam of my flashlight, and in the center of the wood sat a polished bronze plate stamped with three raised figures:

404