The Descent
The cavern entrance was not where the seismic data predicted it would be — it was thirty meters to the east, concealed behind a rockfall that appeared natural until Yuki examined the stones and found that they had been placed, not fallen. Each rock bore tool marks on its inner face, marks that her field guide attributed to no known quarrying technique and that were oriented not outward, as defensive fortification would require, but inward, as though the barrier had been constructed not to keep people out but to keep something in.
She entered alone, which violated every protocol she had helped write, carrying a headlamp, a gas detector, and a growing certainty that the rational part of her mind was losing an argument with something older and less articulate. The passage descended at a consistent fifteen-degree angle, its walls smooth in a way that suggested not erosion but finishing — someone, or something, had polished these surfaces with deliberate care. The air was warm and carried a smell that she could not identify, something between ozone and honey, sweet and electric and wrong.
At a depth she estimated at four hundred meters, the passage opened into a chamber that her headlamp could not fully illuminate. The beam reached into darkness and found no far wall, no ceiling, only empty space of a magnitude that the mountain's geology could not accommodate. The pulse was