Chapter 110 - The Subterranean Vaults of Sihlquai
To cross the Limmat without being spotted by the drone surveillance Julian had undoubtedly deployed over the bridges, we had to go underground. Zurich is not merely a city of pristine banking halls and clockmakers; beneath its polished surface lies a sprawling, centuries-old labyrinth of subterranean water channels, old mill races, and industrial utility vaults dating back to the Reformation.
Clara led the way, using a master maintenance key she had acquired during her years with cantonal security. We pried open a heavy cast-iron grating near the old waterworks, slipping down a rusty vertical ladder into the roaring darkness of an overflow sewer that ran parallel to the river.
The air was frigid, thick with the smell of wet stone, silt, and ancient lime mortar. Water rushed past our boots, icy and relentless, soaking our trousers up to the knees.
"Keep your flashlights low," Clara warned, her voice bouncing hollowly off the vaulted masonry. "Sound carries through these conduits all the way to the municipal monitoring stations."
Maya walked between us, holding Clara’s coat with one hand and mine with the other. Despite the freezing water, she didn't complain once. The blue estate folder, wrapped in waterproof oilcloth inside my rucksack, pressed against my spine like a block of lead.
We reached a junction where the sewer met the foundation stones of the old guild district. Clara shone her beam onto a reinforced iron doorway set directly into fourteenth-century ashlar masonry. Above the lintel, half-eroded by damp and time, was the carved crest of our family: a raven perched upon an anvil.
"Eleanor’s emergency sally port," I whispered, touching the cold iron. "She showed me the schematics when I was sixteen. She said if Father ever brought the family to ruin through his hubris, the heart of the estate could only be accessed from the river's throat."
"How do we open it?" Clara asked, examining the keyhole, which had no modern electronic keypad or biometric scanner, only an intricate, star-shaped mechanical cylinder.
I unbuttoned my collar, reaching for the silver chain around my neck. Suspended from it was not a jewel, but the antique, five-pointed winding key Eleanor had given me on my eighteenth birthday—the key Father had mocked as a sentimental piece of junk.
I inserted the key into the cylinder. It slid in with terrifying smoothness, as though the internal pins had been freshly oiled yesterday.
I turned it ninety degrees clockwise, then forty-five degrees counter-clockwise.
A deep, hydraulic groan reverberated through the stone walls. Dust rained down from the ceiling as the heavy iron door unsealed, swinging inward into absolute, velvet darkness.
From within the opening came a dry, conditioned draft of air smelling of ozone, aged parchment, and warm vacuum tubes—the unmistakable scent of a cold-war era sovereign vault.
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"Welcome to Vault Zero," I said, stepping across the threshold.
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