The speaker died on what I guessed was the twenty second day.
Draven walked in, pressed the button, and the music simply stopped. No dramatic flourish. Just silence rushing in like cold water. For one blessed heartbeat the cube was quiet except for our ragged breathing.
Then the song started again inside my head.
Silent Night. The same gentle piano, the same angelic voice, looping exactly where it had left off. I jerked against the chains, eyes wide. Luca's head snapped up at the same moment. His cracked lips moved without sound: "You hear it too?"
I nodded once, too afraid to speak. The melody wasn't coming from the walls anymore. It lived behind my eyes, threaded through the black veins that now pulsed faintly under my skin whenever I closed them. Torin's massive shoulders trembled. Mara laughed again that brittle, broken sound but this time it cracked into a sob halfway through the chorus.
Draven studied us like an artist checking his canvas. "Good," he said softly. "The resonance has taken root. The song belongs to you now. It will never leave."
He didn't need the white coats anymore. The injections had done their work. The cuts had healed into faint silver lines that itched. Every time the invisible music swelled, the Aether inside us answered, humming in perfect, terrible harmony. I could feel it rewriting me from the inside out not changing my body, but hollowing something deeper. A place where hope used to live.
The next few days were worse than the scalpels. Without the physical pain to focus on, the song became everything. It played while we were fed thin broth through tubes. It played while they washed the blood from our hair. It played while I lay awake staring at the swinging bulb, counting the seconds between each verse like a dying man counting heartbeats. Mom's face kept flickering behind my eyes her tired smile when she handed me the envelope, the way she'd brushed the crumb from my shirt like I was still her little boy. Mia's drawing. The promise I'd made. All of it twisted into the lullaby until I couldn't tell where the memory ended and the music began.
I started whispering the words just to stay sane. Luca joined me on the third night, voice hoarse and broken. Torin never sang, but his lips moved sometimes. Mara sang loudest, like she was trying to drown the song with her own voice. None of it helped. The Aether only grew stronger.
On the morning of the twenty eighth day the door opened and four strangers walked in. Clean uniforms. No masks. They carried towels, warm water, and clothes folded with military precision. Draven stood behind them like a proud father.
"Time to go home, children," he said.
They unlocked us. My arms fell like dead weight when the chains dropped. I collapsed forward and someone caught me gentle hands, almost kind. They washed us in silence. The water stung the old burns but the song never paused. They dressed us in suits that cost more than my mother's yearly salary charcoal wool, crisp white shirts, silk ties knotted with perfect Windsor loops. The fabric felt obscene against skin that still remembered iron and blades. My reflection in the small mirror they held up showed a handsome young man with broad shoulders and a strong jaw. But the eyes… the eyes were wrong. Hollow. Like someone had scooped out the light and left polished stone behind.
They loaded us into a plain white van. No blindfolds. No threats. Just Draven standing at the open door, hands in his pockets.
"The song will guide you now," he told me quietly. "When the mountains call, you'll know what to do. Your father would be proud."
The doors slammed. The engine started.
We drove for hours through scarred valleys and past silent checkpoints. None of us spoke. The song filled the van instead, loud enough now that I could see Luca mouthing the words in time with it. At the border the driver simply stopped, opened the doors, and gestured like we were tourists being dropped at a hotel.
"Walk," he said. "Your people are waiting on the other side."
We stumbled out into the night. The border fence had been cut open just wide enough for four broken bodyguards in expensive suits. Beyond it, floodlights swept the no-man's-land. I took one step, then another. My legs felt borrowed. Every footfall landed in perfect rhythm with the lullaby still playing inside my skull.
Luca fell first. I caught him under the arms and dragged him forward. Torin carried Mara when her knees gave out. We must have looked like ghosts in tailored clothing four hollow-eyed men limping toward the lights of home.
Apex Veil's border patrol found us at dawn. Flashlights in our faces. Shouted questions. Someone recognized Luca and started cursing. They bundled us into an armored truck, wrapped us in blankets that smelled like fish, and drove us straight to the central compound without stopping.
The debriefing room was too bright. Too clean. A table. Chairs. A one way mirror I knew was full of people watching. I sat with my hands flat on the wood, trying to keep them from shaking. The song had quieted to a whisper now, but it never left.
They asked what happened. I told them everything.
The poisoned dinner. The ambush. The cube. The scalpels. The burning iron. Draven. The Christmas song that wasn't Christmas. The way the Aether had crawled into us and refused to leave. My voice stayed steady the whole time, like someone else was speaking through my mouth. When I finished, the silence in the room felt heavier than any chain.
Luca added the parts I couldn't. Torin simply nodded when they asked if it was true. Mara stared at the wall and smiled that same cracked smile.
The director an older woman with silver hair and eyes that had seen too many missions leaned forward. Her face had gone pale.
"Voss is dead," she said quietly. "We confirmed it yesterday. The rest of you… you were supposed to be the message. They let you go to show us they could break our best."
She stood. "You're on mandatory leave. Full pay. Therapy. Whatever you need. Go home to your families. We'll handle the rest."
She didn't say what "the rest" meant, but I already knew. Even before the door closed behind her, I could feel the gears turning. Apex Veil didn't forgive. Within hours, strike teams would be moving. By tomorrow the cube would be rubble and everyone in it would be dead. Draven. The white-coats. Everyone who had touched us.
We were loaded onto a private flight home the same afternoon. I sat by the window watching the scarred mountains shrink behind us. The song had gone almost silent now, reduced to a faint hum beneath my heartbeat. But when I closed my eyes I could still see the black veins glowing faintly under my skin.
Mom met me at the station. She cried before I even reached her, pulling me into a hug that smelled like lavender soap and home. Mia crashed into my legs a second later, babbling about Shadow and how she'd saved all my favorite cereal. I hugged them both so hard I was afraid I might break them. I smiled the right way. I laughed when Mia showed me her new drawing, the one of me standing tall in a suit like some kind of secret agent.
But when Mom pulled back and looked into my eyes, her smile faltered for half a second.
"Elias?" she whispered. "Sweetheart… are you okay?"
I told her I was. I told her everything was fine now.
The hollow thing behind my eyes didn't blink.
That night, after Mom and Mia had gone to sleep, I stood in the dark kitchen staring at my reflection in the window. The song was back just the first few notes, soft and coaxing.
And somewhere deep beneath the city, far beyond the border we had crossed, the mountains answered.
Not yet, the hum seemed to say. Not yet.
But soon.