The darkness was total, dense, a living entity pressing against their eyes, filling their mouths with the taste of earth and ancient mold. The blows from the other side of the door were no longer knocks. They were assaults. Wood splintering, metal groaning against hinges.
"Back!" yelled Valesi, but his voice was swallowed by the reverberation. He grabbed Martinez by the arm and they threw themselves deeper into the tunnel, stumbling on an uneven floor of packed earth and stones. The air was cold, stagnant, smelling of must and something sweetish, like rotten flowers.
The final crash was a dry shattering, followed by a sudden silence. Then, footsteps. Not the heavy hoofbeats they expected, but light steps, almost cautious, echoing in the room they had just left.
Martinez held her breath. Her hand sought Valesi's in the dark, their fingers intertwining, sole anchors of warmth in that underground chill. She felt his pulse beating fast and strong against hers.
A faint light cut the darkness. Not an electric torch, but the flickering flame of a candle. The glow danced on the damp tufa walls, revealing a low, narrow tunnel that vanished into the darkness ahead. The figure holding the candle was small, hunched.
"Valente has spoken too much," whispered a woman's voice, hoarse with age and dust. "Always like that. A big heart and an even bigger mouth. Come. They haven't crossed the threshold, but they will sense the void. They will follow the scent of fear."
Martinez stiffened. "Who are you?"I am Beatrice. And you are the commissario who doesn't know how to listen to walls, and the foreigner who carries time on her wrist like a sentence." Her pale eyes, reflected by the candlelight, settled on Martinez's watch. "Twenty-three hours, thirty-seven minutes. Roma's breath grows thinner for you."
Valesi took a step forward, his body still tense from the urge to flee. "Valente... out there..."Valente made his choice," Beatrice cut him off, turning away. "His choice was to protect the Gate one last time. Yours is to follow me or become an echo within these walls. Choose quickly."
The footsteps in the room behind them resumed, more decisive. A cold, white halogen light peeked through the breach of the destroyed door.
Beatrice slipped into the tunnel without another word. Valesi and Martinez exchanged a single glance, a silent message of desperation and suspicion, then followed her.
The passage wound, dipped, at times so narrow they had to proceed sideways. The air grew colder, heavier. The sound of their labored breaths and footsteps muffled by the earth mixed with the constant drip of water seeping from the vaults. Beatrice moved from memory, the candle shielded by a wrinkled hand, every movement precise, economical.
"Where are you taking us?" asked Martinez, her voice a breath.
"To see what you are looking for," replied Beatrice without turning. "The reason why Roma is vomiting foreigners. The Gate is not a metaphor, agent. It is a wound."
After what seemed an eternity of curves and descents, the tunnel opened into a wider space. Not a natural cavern, but an ancient structure. Walls of Roman brick, round arches yielding to darkness. Beatrice raised the candle.
They were in a kind of circular vestibule. In the center, on the floor of worn bricks, was a perfect circle of dark metal, set into the stone. It had no thickness, it looked like a slab of polished obsidian that absorbed the candlelight instead of reflecting it. Around the circle, on the floor, words were inscribed in a Latin so ancient it was almost illegible. Martinez recognized only one phrase, repeated: "*HIC SVNT FINES*". Here are the boundaries.
"What is it?" murmured Valesi, approaching. His shadow, cast by the candle, fell upon the dark circle and seemed to vanish inside it.
"The navel," said Beatrice. "The point where Roma was founded. Not the Palatine of the tourist guides. This. A place that should be sealed, forgotten. A place that *was* sealed."Until?" pressed Martinez, her eyes fixed on that stain of non-color on the floor.
"Until someone, a foreigner with a heart full of Roma and a mind full of pride, thought he could heal it. 'Restore it'." Beatrice placed the candle on a stone ledge. Her shadow stretched, gigantic and flickering on the vault. "The architect. Silvestri."
Valesi felt a shiver of understanding. "Silvestri? The missing Milanese? He... opened this thing?"He *tried* to close it," corrected Beatrice, and for the first time a trace of infinite weariness could be caught in her voice. "It is a common mistake. Thinking purity is a matter of closure, of exclusion. He believed, like others before him, that Roma was sick because too many outsiders trampled its heart. He studied forbidden texts, found this place. Used his science and his madness to... awaken the mechanism. To activate the purification."
Martinez stared at the dark circle. "The mechanism of the disappearances."Not disappearances," said Beatrice. "Removals. The city's defense system, so to speak. Asleep for centuries. He reactivated it, but did not know how to control it. The Gate no longer distinguishes between a tourist and a twenty-year resident. It reads only blood. Place of birth. The civil registry certificate of the soul, if you will. And now it proceeds on its own, following a logic we have forgotten."And the sentinels?" asked Valesi. "The voices on the phone?"The administrators," hissed Beatrice. "I do not know what they are. They could be the mechanism itself taking form. Or something ancient that stood guard and is now free. Or else... parts of Silvestri himself, torn away during the process and caught in the weave of the Gate. They speak with his knowledge, act with his distorted will. They want to complete the work. Cleanse Roma. And anyone who interferes is a virus to be eliminated."
A distant noise echoed in the tunnels behind them. A metallic thud.
"They have found us," said Beatrice, without panic. She took the candle. "The Gate activates in cycles. Every night, at the same hour, for a few minutes. The last cycle was the great removal. The next will be smaller, targeted. To clean up the residue. Like you, agent. And like anyone contaminated by the knowledge, like you two."How do we stop it?" yelled Martinez, desperation finally breaking through the wall of control. Her shadow trembled on the wall.
"You don't stop it," replied Beatrice, and her eyes were full of a terrible pity. "You satisfy it. It is hungry for a certain... signature. That of the one who awakened it. Silvestri activated it, but did not 'feed' it. It was left half-finished, unstable."
Valesi stared at her, his brain working at breakneck speed, connecting the dots of the grotesque nightmare. "The model in his apartment. The personal objects arranged in a circle. It wasn't a memorial. It was an offering. An attempt at payment."
Beatrice nodded slowly. "He gave everything he had. But it wasn't enough. It wasn't *him*. The Gate wants the source. It wants Silvestri."But Silvestri is missing! Removed!" exclaimed Martinez.
"Exactly," murmured Valesi, his face gaunt with revelation. "He wasn't removed like the others. He is *inside*. He is what the Gate is digesting. But it's not enough. It needs to... complete the process."
The footsteps in the tunnels were closer, more numerous. White lights cut the darkness at the entrance to the vestibule.
Beatrice moved toward a wall, pressing on a brick that gave way with a slight click. A section of the wall swung aside, revealing another passage, even narrower. "This path leads to the cellars of a building on via dei Coronari. Go out. Find what remains of Silvestri. Not his body. His trace. His bond with this place. Bring it here before the next cycle."And how the hell do we do that?" Valesi growled.
"He left a mark on the world," said Beatrice, pushing them toward the opening. "Look where his obsession for Roma became flesh. Not in his plans. In his shames. In his failures. Roma does not feed on glories, commissario. It feeds on sacrifices."
The first figures appeared at the entrance to the vestibule. Tall, motionless, their faces hidden by the shadow of their hoods. The Sentinels. They did not advance. They merely blocked the exit.
Beatrice pushed them into the passage and turned, facing the figures. "Quickly," she whispered. "The keeper performs his final duty."
The stone slab began to close. In the last flicker of candlelight, they saw Beatrice raise her arms, as if to embrace the darkness, and walk with slow steps toward the dark circle in the center of the room, softly singing a dirge in a dead language.
Then darkness swallowed them again, and only the echo of that ancient song followed them, along with the chilling, metallic and living sound of the Gate beginning to vibrate.