The fire started in the roots.

That is what they told us. That the blight had taken hold deep in the black earth, a sickness of the soil that turned the sweet potato vines into twisted, necrotic things. We did not know then that the roots were not the problem. We were the problem.

I was a warder. My name was Elias Thorne. I wore the grey tunic that itched at the collar and smelled of damp wool and antiseptic. My partner was Silas. Silas was a big man, broad as a barn door, with hands like hams and a heart that beat too hard for his chest. We were bonded. Not by blood. By the work. By the long, grey hours spent in the greenhouse sectors, counting the hours of light, adjusting the humidity, watching the plants grow.

The Institute was a place of glass and steel. It sat on the edge of the cliffs, where the wind howled like a banshee. Inside, it was silent. A sterile silence. The kind that presses against your eardrums until you forget the sound of your own blood.

We grew the Caelum.

It was a strange crop. A vine with leaves like jagged emeralds. It produced no fruit. No flower. It only grew. It reached. It wanted.

Silas loved it.

"Look at her," he said one morning. He pointed to a particularly vigorous specimen in Sector Four. Its tendrils were thick as my wrist. They curled around the trellis with a strength that felt unnatural. "She’s hungry, Elias. She’s got a will."

"Plants don’t have wills, Silas," I said. My voice was dry. I was tired. Everyone was tired. The shift changes were brutal. Twelve hours on, twelve off. The fatigue settled in the bones.

"She has something," Silas insisted. His eyes were wide. Bright. There was a fever in him that I had seen before. The fever of the obsessed. "You feel it, don’t you? The pull."

I felt nothing but the ache in my knees. I adjusted the pH levels in the water tank. "Check the nitrogen again. If it’s off, we lose the batch."

Silas laughed. It was a short, sharp sound. "Nitrogen. You think it’s just nitrogen?"

I looked at him. I knew that look. It was the look of a man who had stopped seeing the world and started seeing a ghost. I reached out and put a hand on his shoulder. "Silas. Step back."

He shook me off. His grip on my arm was iron. "They’re coming for her, Elias. The Board. They want to cut her down. To sell the biomass. They don’t understand. She’s not biomass. She’s a door."

I pulled my arm free. My heart hammered. "We are warders. We do not speculate. We maintain."

"Maintain what?" Silas hissed. "The cage?"

The air in the greenhouse was thick. The airlock hissed behind us. We were alone. Or so we thought.

The lights flickered. A low hum rose from the vents. The Caelum vines in the shadows seemed to stir. To reach.

I looked at the central specimen. The one Silas had pointed to. Its leaves were dark. Almost black. And they were moving. Slowly. Like a sleeper turning in bed.

"Silas," I said. My voice was a whisper. "Stand away from the glass."

He did not move. He was staring at the vine. His face was pale. His lips were moving. Praying? Cursing?

The vine snapped.

It was a sound like a whip cracking. The tendril flew out of its mooring. It did not hit Silas. It hit the glass. A spiderweb of cracks bloomed across the pane. Then the vine retreated. As if ashamed. Or as if it had tested the strength of the barrier.

Silas turned to me. His eyes were wet. "It knows me," he said. "It knows I’m trying to help it."

"You are helping no one," I said. I reached for my baton. It felt cold and useless in my hand. "You are compromised, Silas. I have to report this."

The word *report* hung in the air. Heavy. Final.

Silas’s face changed. The fear vanished. It was replaced by something cold. Something hard. "You would do that?" he asked.

"I have to."

"You’re a coward."

The word struck me harder than a blow. I had served the Institute for twenty years. I had kept the peace. I had kept the order. I was not a coward. I was a necessary evil.

"Step away from the console, Silas," I said.

He moved toward the main control panel. The one that regulated the atmosphere for the entire sector. The one that could seal the greenhouse. Or open it.

"No," I said. I moved to intercept him.

He turned. And he struck me.

It was a single, powerful blow. It caught me in the ribs. I gasped. The air left my lungs. I fell to my knees. The pain was a white hot spike.

Silas stood over me. He was breathing hard. His chest heaved. "I’m sorry," he said. "But I have to free her."

I reached for my baton. My fingers closed around the plastic handle. It was slick with sweat.

Silas kicked me. He kicked me in the chest. I rolled back. I was on my back. The ceiling lights were blinding.

He came at me again. I scrambled up. I swung the baton. It connected with his shoulder. He grunted. He did not fall. He grabbed my arm. He twisted.

The pain was blinding. I cried out. I could not breathe. My vision blurred. I saw Silas’s face. It was twisted in rage. In sorrow. In love.

"I’m doing this for you too," he said. "Don’t you see? She’s the only thing that’s real."

I headbutted him.

It was a desperate move. A last resort. My forehead struck his nose. Bone on bone. The sound was wet. He staggered back. Blood trickled down his lip.

I swung the baton again. This time, I hit him in the temple.

He fell.

He hit the floor with a heavy thud. He did not get up.

I stood over him. My hands were shaking. My ribs screamed. I looked at the vine. It was still. Silent.

I looked at Silas. His eyes were closed. A pool of dark blood spread on the metal floor.

I had done it. I had killed him.

I looked at the console. The red button. The emergency seal.

If I pressed it, the greenhouse would flood with gas. Silas would die. The Caelum would die. The evidence would be gone.

If I didn’t press it, the Board would come. They would see Silas. They would see the broken glass. They would see me, standing over his body.

They would say I had been compromised. They would say I had been seduced by the plant. They would say I had killed my partner in a fit of madness.

They would be right.

I looked at Silas. I thought of all the years. The shared meals. The jokes. The quiet understanding. He was my brother. In all the ways that mattered.

And he was a monster.

I reached for the console. My finger hovered over the red button.

The vine moved.

It was a subtle motion. A curl. A reach.

It was reaching for Silas’s hand.

I froze.

I looked at the vine. I looked at Silas.

I realized then that the vine was not the door. The vine was the mirror.

It showed us what we were. It showed Silas his love. It showed me my fear. It showed me that there was no good. No bad. Only the cycle. The growth. The rot.

I pulled my hand back from the console.

I did not press the button.

I walked to the door. I opened it. I called for the security team.

My voice was steady. "Silas has breached the perimeter," I said. "He is... unstable. I have engaged him. He is down."

The boots in the hallway were quick. Heavy.

I stood by the door. I watched the team enter. I watched them see Silas. I watched them see the blood. I watched them see the broken glass.

I watched their faces change.

They looked at me.

I looked at them.

I did not flinch.

I had made my choice. I had chosen the system. I had chosen the order. I had chosen to be the wall.

And the wall is cold.

They took Silas away. They took the glass. They took the vine.

They did not take me.

I returned to my post. I put on my grey tunic. It still itched. I adjusted the humidity. I checked the nitrogen.

The greenhouse was empty now. Just the steel. Just the glass.

And the silence.

I sat on my stool. I waited for the next shift. I waited for the next plant.

I did not close my eyes. I did not sleep.

I listened.

And in the deep, dark roots of the earth, I heard them growing.

I am the soil.

I am the root.

I am the blight.