Screams did not reach the Upper Tiers. The Consortium’s soundproofing was mathematically flawless—it severed the sounds of agony as effectively as the filters purged the air of the smell of smoke.

  Maya stood in her bedroom, pressing her trembling palms to her ears. The gesture was futile: an architect’s imagination drew everything for her in minute, structural detail. She saw the pressure doors of Block Four locking shut. She saw three thousand workers and their children waking to suffocation. She saw the waste chutes, leading directly into the Substrate's maw, swinging open with a metallic clang in the darkness. She saw panic turn human beings into a river of living flesh, surging into the abyss.

  Kai stood at the window, watching the sunrise over the metropolis. His silhouette was perfectly straight. He had just erased the population of an entire district with a single phone call, yet his pulse remained steady.

  "Why?" Maya whispered, sliding down the wall. "There were children there, Kai..."

  Kai turned slowly. In the dim light, his face looked like a mask carved from white, dead marble.

  "There are no innocents, Maya. There is only harvest and fertilizer," his voice was quiet, devoid of human inflection. "The Obelisk is the needle holding the City above the void. But Avelo is the muscle capable of snapping that needle. I didn't kill them. I paid a tax so that millions of others would wake up in their beds tomorrow. So that you would wake up."

  "I didn't ask for that price!" she threw her eyes at him, full of hatred.

  "You don't set the price. Neither do I."

  Kai stepped closer. His bandaged hand reached for her hair, but Maya recoiled against the wall with such terror that he froze. For a moment, something human flickered in his empty eyes—a shadow of pain that immediately vanished beneath the armor of cold calculation.

  "You will save this City, Maya. You will push my memorandum through the Board. Because if you don't, Avelo will grow hungry again. And next time, I’ll pick a larger sector."

  He left, leaving her alone. That night, Maya realized: she wasn't just a witness. She was part of the mechanism. And there was no way back.

  Nine years had passed.

  Kai sat in a deep chair on the penthouse terrace. From here, Buenos Aires resembled a perfect, glowing microchip bathed in artificial light.

  Kai’s power was no longer in the shadows. Head of the Department of Deep Security. Officially—the defender of the foundation. Unofficially—the creator of the "Sigma" unit, which silently removed "biological ballast" from society. The conveyor worked flawlessly. The Substrate received its quota on schedule; the Obelisk stood unshakable. The City flourished, unaware that its prosperity was paid for in blood flowing through the pipes of hidden slaughterhouses.

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  Kai shifted his gaze to the hydroponic garden. There, among genetically modified orchids, a boy was playing.

  Elias had just turned eight. He had Maya’s dark hair and Kai’s aristocratic pallor. But, unlike his father, life burned in his eyes. The boy laughed, chasing a mechanical dragonfly.

  Maya sat a short distance away. Over the years, she had turned into the ice queen of the Consortium. Their marriage was a cold pact, a public sham. Elias was the only thing keeping her from stepping over the parapet. And he was Kai’s only weakness. Looking at his son, the Director felt a strange, terrifying warmth. He had built an Eden for him. Elias would never know the taste of rust and decay. Kai had cheated the Abyss.

  Suddenly, the water in Kai’s crystal glass rippled. The water vibrated with such frequency that the glass let out a plaintive ring. In Kai’s head, piercing through miles of shielding, came a rustle. He hadn't heard that voice in years.

  "You’ve built a beautiful greenhouse, Gardener," the Substrate whispered.

  "What do you want?" Kai said, barely audible. "The quota has been delivered. Sigma dropped three hundred bodies an hour ago. You are fed."

  "Meat," Avelo’s voice carried a tone of revulsion. "Rot. Disease. I feed on the waste of your City, Kai. But my roots are tired of toxins. They need a pure impulse."

  Kai felt the cold settle on his spine. He instinctively leaned forward, shielding Elias. "We had a deal, Avi. I provide the volume. You don't touch the Upper Tiers."

  "Deals are written on paper. The Garden lives by the laws of blood," the Substrate’s voice grew louder, drowning out the sound of the waterfall. "You are lucky today, brother. Do you remember this age? Eight years old. The perfect time for the Culling. The time when neuroplasticity is at its peak, and the mind is still pure."

  "NO!" Kai jumped up. His shout made Elias turn around in surprise.

  "He looks so much like me," Avelo rustled with a tender longing. "I want him, brother. Give him to me voluntarily. Do this, and I won't touch the City for a hundred years."

  "Get out of my head!" Kai gripped his temples.

  "You deny the Abyss its sacrifice?" the whisper turned ice-cold. "Then I will take it myself."

  A low, guttural hum vibrated. It wasn't the sound of destruction, but a glitch in physics itself. Elias's mechanical dragonfly plummeted to the floor. Gravity on the terrace failed.

  The water from the pool surged upward into a giant sphere. Dirt from the planters floated in the air. "Elias!" Maya tried to rush to her son, but her feet left the floor.

  Elias began to be pulled inexorably upward, toward the glass dome. The boy clung to the stem of a decorative tree. Kai, whose weighted boots kept him on the floor, lunged toward him. "Hold on!"

  But he was too late. From the marble planter the child was holding onto, something erupted. A glossy-black vine, covered in pulsating veins, tore through the stone. The Substrate hadn't broken through from below—it had grown here, from spores that had been entering through the irrigation system for years.

  The vine coiled around Elias’s ankle. The boy let out a piercing scream as the Substrate jerked him, tearing his fingers from the tree. The vine dragged its prey into the marble vortex, which was transforming before their eyes into a black maw leading into the depths.

  "KAI!!!" Maya’s scream, hanging in the air, broke into a rasp. "DO SOMETHING!"

  The vine had already dragged the screaming child halfway into the black, pulsating mass.