Marcus had been cleaning floors at the hospital for three months. It was a boring night job, but it paid the bills. The place was always quiet after 10 PM, just him and his mop bucket rolling down empty hallways.

There was one room he never went into though. Room 237. His boss told him to stay away from it on his first day.

"Don't worry about that one," she'd said. "Just clean around it."

The door was always closed tight. No visitors ever came. No doctors went in or out. It was like the room didn't exist.

But tonight was different. Tonight the door was open just a crack.

Marcus stopped his cart and looked around. The hallway was empty like always. He could smell something weird coming from the room - sweet and rotten at the same time, like fruit left out too long mixed with something metallic.

He knew he shouldn't look. Every part of his brain was screaming at him to walk away. But he couldn't help himself. He pushed the door open.

The smell hit him like a punch to the face. The room was dark except for some machines that blinked red and green. But as his eyes got used to the darkness, he saw something that made his stomach turn.

The hospital bed wasn't a bed anymore. It was covered in something that looked like melted skin and meat all mixed together. Tubes and wires went into this blob of flesh, pumping dark liquid in and out. The thing pulsed like a giant heart.

Then it moved. The blob shifted and Marcus saw what might have been a face. No eyes, just empty holes. A mouth that opened way too wide, full of sharp teeth going down into darkness.

"Hungry," it whispered without moving its lips. The voice seemed to come from the walls themselves.

Marcus tried to run but his legs wouldn't work. He looked closer at the tubes coming out of the thing and felt sick. They went into the walls, disappearing into holes that led to other parts of the hospital.

That's when he understood. This thing was connected to the whole building. All those tubes went to other rooms, other patients. It was feeding on everyone in the hospital.

He thought about Mrs. Johnson on the third floor who came in for simple surgery but kept getting worse. About the kid in room 408 who was supposed to go home weeks ago but now couldn't even wake up. They weren't sick - they were being drained.

Something wet wrapped around his ankle. One of the tubes had crawled across the floor like a snake and was digging into his leg. He could feel it sucking his blood out, making him weak and dizzy.

But feeling his life drain away made him angry instead of scared. All those people who died thinking they were just unlucky. All those families who never knew the truth.

Marcus grabbed a knife from a medical tray and cut the tube off his leg. Black blood sprayed everywhere and the thing on the bed screamed so loud it broke the windows.

More tubes shot out of the walls trying to grab him. Marcus ran for the electrical box he'd fixed a dozen times during his shifts. If he could cut the power, maybe this nightmare would die.

He ripped open the metal box and saw more than just wires inside. Gas pipes, oxygen lines, and containers of cleaning chemicals from the basement. All connected, all feeding this monster.

Marcus jammed the knife into the electrical panel. Sparks flew everywhere.

The explosion lit up the whole city.

Marcus woke up in a different hospital three weeks later. Most of his body was burned, but he was alive. The news said forty-three people died in the hospital fire caused by faulty wiring and a gas leak.

They didn't know the truth. Those forty-three people were already dying, being slowly eaten by something that should never have existed. At least now it couldn't hurt anyone else.

Marcus looked at the IV in his arm, watching the clear fluid drip into his veins. The nurse smiled and checked his chart.

"You're healing nicely," she said. "Should be able to go home soon."

Marcus nodded but didn't take his eyes off that IV bag. He'd make sure it stayed clear. And he'd never let them turn off the lights in his room.

Some things are worse than death. Some things pretend to heal you while they eat you alive. And sometimes the only way to stop them is to burn everything down.