The Overflow

The first time I saw it, I thought the pipes were leaking. But the stain on the ceiling above the clawfoot tub wasn’t water. It was a shadow that moved. I’d lived in the Pinecrest Apartments for three years, in unit 4B, a cramped one-bedroom with a bathroom the size of a closet. My name is Elena, and I’d never been afraid of small spaces, but I’d always had a weird thing about mirrors. Not the fear of seeing something behind me—more like the fear of seeing something in my own reflection that shouldn’t be there. As a kid, I’d cover the bathroom mirror with a towel until I was ten. When I moved out, I thought I’d outgrown it. I was wrong.

The night it started, I’d come home from my night shift at the 24-hour pharmacy, exhausted. I kicked off my shoes, grabbed a towel, and headed straight for the shower. The bathroom light flickered—it always did, the wiring was old—and as the hum of the fluorescent tube steadied, I saw the stain. It was a dark patch, maybe a foot wide, directly above the shower curtain rod. It looked like wet newspaper, but it wasn’t wet. It was flat, and it moved. Not like a bug, but like a slow breath, expanding and contracting. I blinked, and it was gone. I told myself it was a shadow from the flickering light, but the light had already stabilized. I took my shower, but I couldn’t shake the feeling that I wasn’t alone. I kept glancing up, but the ceiling was clean, white, and peeling.

The next night, the stain was back, bigger, and it had spread down the wall behind the toilet. This time, I didn’t move. I watched it. It seemed to be watching me back. The shape was amorphous, but there was a denser core, like a clot of pure darkness, and from it, tendrils seeped outward, reaching for the grout lines between the tiles. I felt a chill that had nothing to do with the cold air. I left the bathroom, but I left the door open, and I slept with the light on in the hallway.

The following morning, I noticed the water pressure in the sink was lower than usual. The faucet sputtered, and a black, oily residue coated the basin. I frowned, turned off the water, and ran my finger through the residue. It was slick, and it smelled faintly of decay—like rotten leaves and wet earth. I’d heard of mould in old buildings, but this was different. It didn’t wipe off; it seemed to absorb into my skin, leaving a faint grey stain that faded after a few minutes.

My neighbour, Mr. Hargrove from 4C, knocked on my door that evening. He was a retired plumber, always tinkering with something. He’d noticed my toilet running and offered to take a look. I let him in, and he headed straight for the bathroom. I heard him curse under his breath. When he came out, his face was pale. ‘Elena, you’ve got a serious clog,’ he said. ‘The main line’s backed up. Water’s not draining right. I’d call the super, but I’ve got a feeling it’s not just pipes.’ I asked him what he meant. He shook his head. ‘There’s something growing in your pipes. I’ve seen it before, in an old building I worked in. It looks like… black mould, but it’s not. It’s like it’s alive. I’d get out of here if I were you, at least until it’s cleaned.’ He left, and I stood in the doorway, staring at the bathroom door, which he’d closed.

That night, I couldn’t sleep. Every creak of the building made me jump. I lay in bed, staring at the ceiling, listening to the faint sound of water dripping in the bathroom. Drip. Drip. Drip. It was rhythmic, almost hypnotic. I must have dozed off, because I woke with a start to a louder sound—not a drip, but a gurgle, like something being swallowed. I sat up, heart pounding. The bathroom door was open. I hadn’t opened it. I got up, my legs shaking, and peered inside. The light was off. I flipped the switch, and the fluorescent tube buzzed to life. The bathroom looked normal, but the toilet bowl was full of black water, and the sink was overflowing with a thick, oily substance that spilled onto the floor. It was spreading, crawling along the tiles, reaching toward the bathtub.

I didn’t think. I grabbed my phone and ran out of the apartment, not stopping until I was in the street, gasping for breath. I called the super, but he didn’t answer. I called a 24-hour emergency plumbing service. The plumber arrived, a guy named Luis. He took one look at the bathroom and said, ‘I can’t fix this. You need a hazmat team.’ He was pale. He showed me the pipes under the sink. They were coated with a black, slimy substance that pulsed, like a heartbeat. ‘I’ve never seen anything like it,’ he said. ‘It’s like it’s alive.’ He left, too, and I stood in the hallway, alone.

I couldn’t stay there. I booked a motel room, but I left most of my things. The next day, I went back to get some clothes, and I found the bathroom door closed. I opened it, and the bathroom was completely coated in black. It covered every surface, and it was moving, flowing like a slow river. And in the centre of the ceiling, the stain had grown into a hole, and something was looking out. Not eyes, but a presence, a weight of malevolence that pressed down on me. I stumbled backward, but the blackness followed, reaching out with tendrils. I slammed the door shut, and I heard a sound like a thousand whispers, and then the door bulged outward, as if something was pressing against it.

I ran. I didn’t look back. I’ve been living in my car for a week now. I can’t go back, but I can’t escape it either. I see the black in the corner of my eye, in the reflection of windows, in the puddles on the street. It’s spreading. It started in my bathroom, but it’s in the building’s walls now, and I know it’s just a matter of time before it reaches the whole city. I’m writing this as a warning. If you ever see a dark stain that doesn’t wash off, if your drains gurgle with black water, if your bathroom mirror seems to reflect something that isn’t there, don’t ignore it. Get out. Because it’s not just a leak. It’s the overflow, and it’s hungry.