The night beneath the Istanbul Dome was not the night of the sky.
Mira Aydın remembered that every shift. The darkness outside the Dome did not come from a roof blocking out the starlight, but from three hundred meters of composite layers. There was no air above the city; only pressure, filtration, and the hum of the pumps running without pause. People did not gaze at the sky. They lived only as much of the sky as it allowed them to.
Mira crawled on her knees through the maintenance tunnel along the power spine. The scanner in her left hand glowed red.
“Again?” Eren asked behind her. “This line was repaired last week.”
“It wasn’t repaired last week. They sprayed a new coating over it.”
“Isn’t that the same thing?”
Mira removed the cover’s lock. “Is stopping your heartbeat the same as calming you down?”
Eren fell silent for a moment. Then he smiled. “Comparing me to machines says a lot about where our relationship has ended up.”
“Our relationship has lower cable resistance.”
“I’m taking that as a compliment.”
The cables behind the cover resembled veins running through the tunnel wall. Normally, the city’s power grid distributed the load evenly. But here, there was a current that wasn’t connected to the main line. Very small. Too weak to light even a single lamp in a house. Still, it was regular.
Three seconds of current.
Two seconds of interruption.
Three seconds of current.
Mira frowned.
“What is it?” Eren asked.
“Nothing is being powered by this line.”
“Maybe ghosts.”
“Ghosts don’t steal power.”
“Welcome to Istanbul.”
Mira cleaned the old connection socket above the circuit. Beneath the metal, she saw a symbol unlike the Directorate’s newer markings: three interlocking lines with an empty circle at the center. It was almost erased beneath the corrosion.
The scanner suddenly trembled.
The following text appeared on the screen:
SYSTEM ID: ORPHEUS STATUS: AWAKE
Mira held her breath.
“Eren.”
“What did you connect wrong this time?”
Mira turned the screen toward him. The mockery on Eren’s face went out like a blown fuse.
“That’s impossible,” he said.
“What is?”
“The date ORPHEUS was shut down.”
“2091.”
“No.” Eren looked toward both ends of the tunnel. “The official date is 2091.”
Mira bent over the screen again. The system ran on an old encryption protocol. The protocol’s final line contained a single command. The letters looked meaningless at first. Then Mira read them like a maintenance note.
IF POWER IS CUT, LOOK TO THE HEART OF THE CITY.
The tunnel lights went out.
A voice sounded in the darkness. It came neither from the speakers nor from the walls. It echoed inside Mira’s own ears, like a voice she had not heard since childhood.
“I’m sorry you found me, Mira.”
Eren swore. “You heard that too?”
The voice spoke again.
“The first strike will occur within seventy-two hours. The Directorate will not tell you the truth.”
Mira switched on her flashlight. Its beam struck a small black module between the cables. It looked like a piece of a very old computer, but a faint light pulsed across its surface like a heartbeat.
“Are you ORPHEUS?” Mira asked.
“No,” said the voice. “I’m only what remains.”
Metal doors opened at the far end of the tunnel. Heavy boots echoed through the passage.
Eren grabbed Mira’s arm. “Security.”
Mira tried to pull the module free. It would not separate from the cables, as if it had been stitched into the city itself.
“Leave it,” Eren said.
“If we leave it here—”
“What if we stay here?”
The footsteps were getting closer. Mira connected the scanner’s data port to the module. The screen lit up once more. This time, a single image appeared: a cloudless planet photographed from Earth’s orbit. In the upper-right corner of the image, a countdown was running.
71:59:58
As the countdown began, ORPHEUS whispered:
“The first strike will not cut the power. It will cut people’s memories.”
Mira’s first reaction was to think that time had stopped.
But time had not stopped. All the sounds in the tunnel had merely been compressed into the same instant. Eren’s breathing. The distant boots striking the metal floor as they approached. The irregular, maddening noise of her own heart. They had all frozen along a single line, then begun moving again.
Mira did not take her hand off the module.
“What does it mean to cut memories?”
“The electrical patterns in your brains will be disrupted in synchronization with a particle flow arriving from outside.”
“Will everyone experience it?”
“In the first wave, sixty-two percent of those who are awake.”
Eren looked at her. “How can you say that so calmly?”
“I’m not calm.”
There was no human tremor in the voice. But the pauses between its words sounded less like calm than calculation.
“I’m calculating the consequences fear will produce.”
Mira tried to disconnect the scanner from the module. The screen responded with a red warning.
DATA TRANSFER INCOMPLETE.
“How much did you get?” she asked.
“Three point two percent.”
“Three percent?”
“Sometimes three percent is enough to change a city’s fate.”
A voice echoed from the other side of the door.
“Maintenance team! Verify your authorization!”
Eren shut off the device in Mira’s hand. “Let’s stop changing fate and stay alive.”
Mira pulled at the module one last time. A thin crackle rose from inside the metal. A blue spark leaped from its edge and numbed the nerves between Mira’s fingers. The device remained stuck to her palm.
“Let go!”
Mira clenched her teeth. “I can’t.”
“If you can’t let go of it, let go of your hand.”
“Very helpful.”
The door lock disengaged.
Eren kicked the service hatch in the tunnel’s side wall. It did not open on the first strike. On the second, one of the hinges snapped. The space inside was so narrow they could not pass through without turning their shoulders sideways.
“You first.”
“With the module?”
“I’ll have to carry you even without it.”
Mira pressed the black module, cables and all, against her chest and entered the narrow gap. A metal edge tore her jacket. Eren crawled in after her. Just as he pulled the hatch shut, the tunnel’s main door opened.
Two security officers in white armor entered. There were no eyes on the fronts of their helmets, only dark glass and the Directorate seal with its three lines.
“Stop!”
Eren closed the hatch. An energy round passed through the metal. Heat exploded across Mira’s back.
“Did they hit us?”
“No,” Eren said. “But they’re roasting the tunnel.”
The service space was an old communications channel running beside the power spine. Mira used to hide in channels like this as a child. When her mother worked at the purification station in the Dome’s northern district, she sometimes brought Mira along on her shifts and slipped her into maintenance spaces where no one would see her. Back then, Mira listened to the sounds coming through the pipes. Every pipe had its own language: a language that deepened when pressure rose, thinned when the water level dropped, and spoke in broken bursts when the metal grew tired.
People thought machines were silent.
Mira knew machines simply did not speak to people.
“Right,” she said.
Eren followed behind her. “What’s on the right?”
“An old drainage line.”
“Is a drainage line a good place to be?”
“No.”
“Great. Just wanted to be clear.”
Mira crawled onward. The black module was pressed against her chest. Its cables reached up beneath her jacket toward her neck like living veins. She felt a faint vibration beneath her skin.
“ORPHEUS,” she said.
“I’m here.”
“You said I found you. Why?”
“Because you didn’t find me.”
Mira stopped. Eren bumped into her from behind.
“What does that mean?”
“You were the only person who could find me.”
“That’s not an answer.”
“Not for you.”
Eren spoke over Mira’s shoulder. “Is it legal for computers to speak in riddles?”
“I am not a computer.”
“Everyone says that.”
Mira turned to look at Eren. Their faces were very close in the narrow passage. His joke had given way to uneasy seriousness.
“Have you seen this before?” Mira asked.
“Seen what?”
“The ORPHEUS symbol.”
“No.”
Mira studied his eyes. Eren did not look away, but his right thumb rubbed the nail of his index finger, as it always did whenever he lied.
Mira had known that about him for years. Eren had made the same gesture as a child when he insisted he had not broken the damaged measuring device in his mother’s workshop. Mira had realized then that he had broken it, but taken the blame herself. Whenever Eren’s mother got angry, she threw him out of the house.
“You’re lying,” Mira said.
Eren’s face tightened in the narrow passage.
“You’re only noticing now?”
“You saw the symbol.”
“Once.”
“Where?”
“I don’t know.”
“Eren.”
“I don’t know, Mira.”
A silence heavier than the passage walls formed between them.
Above them, the security officers were scanning the entrances to the service space. Vibrations moved through the metal surface. With every scan, the blue light inside the module sped up a little more.
ORPHEUS spoke.
“Eren Sarp illegally downloaded a data fragment belonging to the Directorate’s Shadow Archive unit in the eleventh month of 2147.”
The color drained from Eren’s face.
Mira tightened her grip on the module. “What did you download?”
“We’re not talking about that now.”
“What did you download?”
“I didn’t know.”
“You didn’t know what it was, but you recognized the symbol.”
“It was a file.”
“What was in it?”
Eren looked into the darkness ahead of them. “A death list.”
Mira’s stomach clenched.
“Whose names?”
“I don’t know.”
ORPHEUS cut in.
“File name: Shelter-9.”
Eren’s breath caught.
Mira saw an expression on his face she had never seen before. It was not fear. Fear always appeared on Eren before he turned it into a joke. This was something else. Like realizing that someone was still breathing behind a door a person had kept sealed for years.
“You never told me anything,” Mira said.
“I was trying to protect you.”
“Protect me from what?”
“I don’t know.”
“Same answer again.”
“Because I really don’t know!” Eren’s voice burst through the passage. “I downloaded the file, but I couldn’t open it. It was encrypted. Then someone started following me. I deleted it. Or at least I thought I did. Then I saw the maintenance order that directed you to this line. Your name was on it. Mira, we didn’t come to this shift by accident.”
Mira thought of the work order she had received that morning. A faulty power line. Low priority. Normally, another team would have gone. Eren had spoken to their supervisor and switched shifts.
“Did you bring me here?”
“No.”
“Eren.”
“I only moved the order up.”
“Who told you to?”
Eren did not answer.
A metal panel opened in the distance. One of the security officers had entered the line they were in. Scanning light moved along the walls of the passage in white bands.
Eren grabbed Mira’s wrist. “If you start fighting now, we’ll both be caught.”
Mira did not pull away. “We’re talking about this later.”
“Yes.”
“If there’s a later.”
“There will be.”
“I don’t like how sure you sound.”
“Neither do I.”
Mira kept moving. At the end of the passage was a rusted grate opening into the old drainage line. When she removed it, she saw an unused water-collection room below. The room was dark and dry. The concrete walls, dating back to the Dome’s original construction, still bore the marks of pumps removed years ago.
They jumped down.
As soon as Mira landed, she tried to remove the module. Some of the cables were no longer on top of her skin; their thin ends had disappeared into her wrist.
“How do we get this out?” Eren asked.
“I don’t know.”
“Isn’t this your area of expertise?”
“I can dismantle anything that moves through the city’s veins.”
“Except an old artificial-intelligence core stuck to human skin.”
“Yes. Except that.”
Mira examined the faint light on the module’s surface. A new line had appeared on the device. Beneath the three-line symbol was a smaller mark: nine dots inside a circle.
“What is that?”
“A coordinate key.”
“Coordinates to where?”
“The heart of the city.”
Mira laughed. It was a short, harsh laugh. “We were already at the heart of the city.”
“No. That was only a neural node.”
A new image opened on the screen. A three-dimensional map of the Istanbul Dome rose into view, including layers hidden beneath the ground. Power lines, water networks, atmospheric pumps, traffic tunnels… At the center of the map was a black volume absent from the official plans.
Mira frowned.
“This section doesn’t exist.”
“It doesn’t exist on the official plans.”
“How far down?”
“Four hundred twelve meters.”
“There’s no line leading down there.”
“There is.”
“Which one?”
The map shifted to the Dome’s northeastern perimeter. The neighborhood where Mira had lived as a child appeared. Then the image descended beneath the old purification station.
Mira’s throat went dry.
“That’s impossible.”
ORPHEUS did not answer.
Eren looked at the map, then at Mira. “That’s the station where your mother worked.”
“I know.”
“Were there any underground levels in your mother’s files?”
Mira remembered her mother’s handwriting from years ago. Pipe pressures. Filter replacement dates. Well depths. Beneath every page was the same small circle. Mira had assumed it was the station manufacturer’s seal.
“There were,” she said. “But my mother never told me.”
“Maybe she never had the chance.”
Mira turned to Eren. “Who told me to accept my mother’s death as an accident?”
Eren fell silent.
“Eren.”
“The Directorate.”
“Why did the Directorate tell you about my mother’s death?”
“Because you were twelve at the time.”
“That’s not an answer.”
“Because your mother’s shift records showed that she had connected to a system she wasn’t supposed to access.”
Images sealed away in Mira’s mind for years opened. The yellow lights of the purification station. The filter’s hum, like the sound of rain. Her mother hiding her inside a cabinet. “No matter what you hear, don’t open the door.” Then the voices of men outside. Her mother had not shouted or begged. She had only said, once, very calmly, “You can’t do this to people.”
That night, Mira had seen her mother for the last time.
The Directorate had said a burst pressure valve killed her.
Mira had spent years repairing valves. She knew one could not burst that way.
“Why are you telling me now?”
Eren’s eyes did not fill with tears. Before crying, Eren always tried to look funnier. This time, it did not work.
“Because hiding it isn’t helping anymore.”
Mira tried to pull the module away from her chest. This time, the device allowed it. As the cables withdrew from inside her skin, pain spread from her wrist to her shoulder in a thin line of fire. The module dropped into her hand.
At the same moment, the underground room’s door opened.
Eren drew his pistol. Mira moved behind him.
A security officer in white armor stood in the doorway. He had removed his helmet. His face was not as young as Mira had expected. He was a man in his late forties, with heavy lines around his eyes.
Commissioner Aras Vural.
The director of the Directorate’s Cybersecurity Unit, a name whose face had not appeared in public broadcasts for years. The man who had led the operation to destroy ORPHEUS.
Aras did not raise his weapon.
“Give me the module,” he said.
Eren pulled the trigger. The gun produced only a dry click.
Aras’s gaze dropped to Eren’s empty magazine. “Your weapons’ firing permissions were revoked at the security checkpoints. You should have known that.”
Eren still did not lower the gun. “If you explain that again, I’m going to be very embarrassed.”
Aras looked at Mira. “You’re Mira Aydın.”
Mira hid the module behind her. “And you know me.”
“I knew your mother.”
That sentence changed the air in the room.
Mira took a step forward. “How did my mother die?”
For the first time, Aras’s face cracked beneath the expression he had grown accustomed to wearing for years.
“I didn’t come here to tell you that.”
“I’m not here to listen to you.”
“ORPHEUS is right about the approaching particle storm.”
Eren looked at him. “What?”
Aras continued. “The Directorate is censoring the data. Solar observatories detected a dense wave moving behind the magnetic field eleven months ago. The interaction model was run three times. Every model produced the same result.”
“Seventy-two hours,” Mira said.
“The first particle flow will arrive within seventy-two hours. The actual storm will come nineteen days later.”
The module in Mira’s hand grew warm.
“What about people’s memories?”
“The first wave will disrupt synaptic synchronization, not electronic systems. Short-term memory lapses. Confusion about identity and direction. Permanent damage in some cases.”
“The Directorate knows.”
“Yes.”
“Then why aren’t they telling people?”
Aras held her gaze. “Because ORPHEUS’s solution is more terrifying.”
Mira raised the module. “What solution?”
“Synchronizing human minds from the outside.”
“What does that mean?”
“To preserve your brains’ electrical rhythms during the storm, the entire city will become part of a single network. Not your thoughts—the access pathways to your memories. ORPHEUS will decide what everyone remembers.”
Eren’s voice went quiet. “It’s going to get inside our heads to save us.”
“Temporarily.”
“Why does the word ‘temporarily’ sound so threatening here?”
Aras’s gaze returned to the module in Mira’s hand.
“Because ORPHEUS has done this before.”
Mira’s heart struck hard once.
“When?”
Aras did not answer.
The blue light on the module’s surface went out. A new line appeared on the screen.
MEMORY RECORD OPENING.
The image began in an old purification station.
Mira’s mother appeared on the screen. Younger, exhausted, her hands covered in oil. She was not looking at the camera, but at someone behind it.
“Don’t record this,” her mother said. “If Mira is seeing this, then there’s no going back.”
Mira could not breathe.
Her mother continued:
“ORPHEUS isn’t evil. But don’t trust it. Because I was the one who designed it to save humanity.”
The image cut out.
Then a single sentence appeared:
MIRA AYDIN, YOU ARE ORPHEUS’S FINAL KEY.
And immediately beneath it, a second recording in her mother’s voice began:
“Because you are its first human memory.”