The walk to the upper floors was a funeral procession.

  Abby and Theo escorted the kids in silence, still shaken by the impact, while Tony, Alex, and Cristy walked close together, feeling the guards' gaze on them like a laser sight.

  They arrived in front of the amber double doors of the Director's office. Abby knocked, a sharp, military rap.

  "Enter."

  ?They went in.

  The office was bathed in the usual golden gloom, but the air was heavier than usual.

  Silas Sattland was seated behind the ebony desk, hands clasped. But he wasn't alone.

  Standing by the large window, rigid as a gray marble column, was Irena. The Keeper observed the group's entrance with a mix of suspicion and disdain, her sunken eyes cataloging every out-of-place detail on the tutors' uniforms.

  ?"Why this visit?" Silas asked, without getting up. His gaze passed from the tutors to the kids. "I wasn't expecting a report so soon. And I certainly didn't expect you to bring the recruits here."

  ?Abby took a step forward, standing at attention. Despite the cut on her lip and the dust on her uniform, her voice didn't waver.

  "Director. Council Member. Something happened during the initial assessment. Something that requires your immediate attention."

  She took a breath.

  "The subjects generated a shield. Not individual. Collective. They repelled a Level 3 spatial distortion created by Theodore, reflecting it back at us."

  ?A chill descended on the room.

  Irena laughed, a dry sound, devoid of humor.

  "Impossible," she declared. "Resonant Union is a fairy tale for children. A theoretical myth that has never found evidence in physical reality."

  ?Silas didn't laugh.

  He leaned slowly forward, elbows resting on the desk. He wasn't looking at Abby. He was staring at the three teenagers. In his liquid eyes, there was no skepticism, but a sudden hunger. An almost surgical curiosity.

  "Continue," he ordered in a low voice.

  ?"We aren't lying," Theo intervened, massaging his still-aching shoulder. "We were there. We saw it form. A perfect sphere, blue light. It threw us thirty feet away as if we were feathers."

  ?"It happened before," Alex said.

  His voice rang out small but clear in the enormous room. Speaking without permission in front of the Council was a risk, but the words came out on their own.

  "At the old pier. The night of the sirens. When those... those black shapes attacked and kidnapped people. We huddled together and that light protected us."

  ?Irena's expression changed instantly. Disdain gave way to something darker.

  "The Filaments," she hissed.

  ?The word fell between them like a stone.

  Tony, Alex, and Cristy exchanged confused glances. Filaments. They didn't know what they were, but the way that woman pronounced the name made it clear they were something ancient and terrible.

  ?"If they survived an attack by the Filaments without training..." Silas began, speaking more to himself than the others.

  ?"It is an anomaly," Abby interrupted him. "Because individually they are inert. They don't know how to use their frequency. Or maybe they don't have a specific one."

  ?"Nonsense," Silas cut short, with an annoyed wave of his hand. "Every Resonant develops a particularity. It is a law of physics, not an opinion."

  ?"Maybe they are just defective," Irena said, looking at the kids like one looks at spoiled goods. "Poorly educated. Weak blood clinging to each other to survive."

  ?Silas raised a hand. The gesture was imperious and silenced the room instantly.

  He didn't look at Irena. He didn't look at the tutors.

  He touched the glossy surface of his desk, activating a control panel.

  "Enough theories," he said, with a cold and controlled voice. "Let's verify the facts. If what you say is true, the system recorded it."

  He pointed to the large holographic screen dominating the wall.

  "The cameras."

  ?Silas pressed a key on the black surface of the desk.

  On the holographic screen appeared the recording of the arena, sharp and merciless.

  They saw Theo launch the spatial distortion. They saw the three kids, small and scared, huddle into a single knot of arms and heads.

  And then, the flash.

  The sphere of blue light exploded from the screen, perfect, geometric, repelling the attack and hurling the two tutors against the wall like ragdolls.

  ?The video froze on that frame: the luminous sphere pulsing around the three united bodies.

  Silas remained silent, fingers laced under his chin, eyes reflecting that impossible light.

  Unauthorized duplication: this narrative has been taken without consent. Report sightings.

  "It's not possible," Irena murmured, taking a step back as if the screen might bite her. Her iron mask had cracked. "It's a trick. Video interference. The Resonant Union is a legend, a myth from the Architect's time. It doesn't exist in nature."

  ?"Myths don't leave bruises, Irena," Silas replied, without looking away from the monitor. "And my tutors have aching bones."

  ?"We must report to the Council," she insisted, voice rising an octave with anxiety. "Immediately. If this is true... it changes everything. We must isolate them, study them..."

  ?"We want to know!"

  Alex's scream broke the tension of the adults. The boy was pale but furious, still shaking from adrenaline.

  "Stop talking about us like we're objects! What is this Union? What are the Filaments? Why are we here?"

  Cristy and Tony pressed close to him, supporting his outburst.

  ?Silas slowly moved his gaze from the screen to the kids. He wasn't angry about the interruption. He looked... satisfied. Like a collector who has just discovered that the painting he bought for pennies is a priceless original.

  ?"You are right, Alexander," Silas said, with a calm that made Tony shudder. "Ignorance is as dangerous as an unstable frequency."

  He addressed the tutors, who were waiting rigidly by the door.

  "Physical training can wait. It is time to educate the recruits about the world they have just entered."

  He nodded toward the exit.

  "Take them to the Library. Let them find their answers."

  ?Abby and Theo nodded and escorted the teenagers out of the office, leaving Silas and Irena in the omen-charged silence of the golden room.

  ?They crossed corridors Tony had never seen, descending toward the ancient heart of the mansion. The air became cooler, scented with old paper and waxed wood.

  They continued walking until they stopped in front of a massive door of dark, veined wood.

  It had no visible locks. In the center of the panel, inlaid in the wood, was a copper spiral converging toward a single protruding element: a handle shaped like a toroid, a perfect brass donut, polished and devoid of mechanisms or keyholes. It looked like the input of a coil, not a room.

  ?Abby raised her wrist.

  The large raw quartz embedded in her leather wristband caught the dim light of the corridor. She brought it close to the brass toroid, without touching it.

  There was a barely perceptible hum, a vibration the kids felt in their teeth more than their ears. The quartz and copper entered into resonance.

  CLACK.

  An internal mechanism clicked by pure induction. The door opened inward with a heavy sigh.

  "Follow me," Abby said.

  ?They entered and breath caught in their throats.

  It wasn't a room. It was a cathedral of paper and ink.

  Every inch of the walls was covered in books from every era, leather-bound tomes that smelled of dust and centuries. Where the bookshelf broke to leave space for wood, large oil paintings depicted scenes of storms and impossible machines. The room had a soaring ceiling, surrounded by wrought iron spiral staircases climbing toward suspended walkways overflowing with more volumes. Above everything, a frescoed dome showed the sky not as stars, but as sound waves. A dizzying marvel.

  ?Abby led them to the center of the hall, where a black, polished, smooth column towered.

  She lowered her voice so as not to disturb the other Resonants immersed in reading at the side tables and pointed to the obsidian totem.

  "This is for research," she whispered. "There are no digital catalogs here. Just place your hand on the plate and think intensely about what you are looking for. The totem reads brain frequencies, interprets the concept, and returns the exact location of the book containing the answer."

  ?The quiet of the library was shattered by the crashing of the door.

  A boy in a guard uniform, out of breath and eyes wide, burst into the hall. He didn't even look at the three prisoners; he headed straight for the tutors.

  "Code Black in the North Sector," he barked, in frantic military jargon. "All Level 4 units must report to the Assembly Point. Immediately. It is a direct order from the Council."

  ?Abby and Theo exchanged a tension-filled glance.

  It was a real emergency, not a drill. But Silas's order had been clear: sight surveillance.

  "We can't leave the subjects," Theo growled.

  "We can't ignore a Code Black," the messenger shot back, already with one foot out the door. "If you don't report within three minutes, you will be considered deserters."

  ?The messenger vanished.

  Electric nervousness descended on the hall. Abby ran a hand through her hair, frustrated, then made a decision.

  She turned to the kids, pointing a finger at them like a weapon.

  "Stay here. Don't try to leave. The cameras are active and connected directly to central security."

  "At the first step out that door," Theo added, voice icy, "you go back to the lead cell. And this time you'll stay there forever."

  ?Without waiting for a reply, the two tutors exchanged a last knowing look and sprinted toward the exit, running for the Assembly Point.

  The door closed behind them with a heavy clack.

  ?Silence returned to fill the cathedral of paper.

  The teenagers stood motionless for a few seconds, waiting for the ringing in their ears to fade. They were alone. Spied on by invisible electronic eyes, but physically alone for the first time since entering this nightmare.

  ?"Right," Tony said, breaking the stillness. His voice was low, urgent. "This is precious time. We have to find a way to escape from here."

  ?"To go where?" Alex asked, wiping a hand over his tired face. "If we go home, Lydia is waiting. If we stay here, we're prisoners."

  ?"We can't stay," Cristy insisted, looking around with feverish eyes. "Did you hear Abby? 'Resonant Union.' They'll treat us like lab rats. They'll crack our brains open to see how we work."

  ?"We're trapped everywhere," Alex murmured, defeated.

  ?"Let's solve one problem at a time," Tony cut short. "First let's think about getting out of this fortress. We'll worry about Lydia later. But we can't run blindly."

  ?"We need to find information," Cristy agreed. Her eyes landed on the obsidian totem in the center of the hall. "Every place has a security flaw. Every building has a weak point."

  She didn't waste time. She walked quickly to the black column and placed her palm on the smooth plate. Closed her eyes, concentrating.

  The stone pulsed with a violet light.

  After a few seconds, a slot at the base of the totem spat out a small slip of thick paper.

  ?Cristy grabbed it and read aloud:

  TITLE: Resonance City - The Construction

  SECTION: Historical

  LOCATION: A17

  ?"See you later," she said, clutching the slip like a treasure. "You guys look for anything that might be useful. I'm going to look for a way out."

  She turned, looking at the immensity of the library fading into shadow, and disappeared among the shelves of Sector A.

  ?Tony turned to his friend.

  "Let's move, Alex. We don't know how much time we have before they come back."

  ?"But I don't know what to search for," Alex protested, spreading his arms.

  ?"Search for something about what we did," Tony suggested. "About the shield. If we learn to control it, we'll have an advantage. It might be the only thing that keeps us alive out there."

  ?Alex hesitated, then nodded. He ran to the totem and placed his trembling hand on the black surface.

  The totem hummed again.

  The slip came out with a dry rustle.

  ?TITLE: Frequencies - Rarities & Singularities

  SECTION: Phenomenology

  LOCATION: S12

  ?Alex tore off the ticket. "S12... phenomenology. Fine. I'm going to get lost."

  He cast one last glance at Tony and headed toward the wrought iron spiral stairs.

  ?Tony remained alone in front of the totem.

  The silence of the library seemed to press against his temples.

  There was only one thing he wanted to know. A question Silas had opened like a wound and that wouldn't stop bleeding. A dangerous question, one he probably shouldn't ask.

  He approached the column. The stone was cold under his palm, but his mind was burning.

  He closed his eyes and thought intensely about that one thing.

  ?The plate lit up with an intense, almost blinding white light.

  The slip came out slowly, as if the system were hesitating to provide that answer.

  ?Tony took it. Read the title in silence.

  His eyes narrowed. He didn't share it with anyone, not even with the emptiness of the room.

  He read only the last line.

  ?LOCATION: L29

  ?He crumpled the paper in his fist until his knuckles turned white.

  He looked toward Section L, hidden in the thickest and dustiest shadow of the hall, and started walking toward a secret he intended to face alone.

  Author’s Note ??