Lu Yan is an ordinary technician at a surveying and mapping firm in Jincheng.
His job is to scan underground utility networks: using instruments to map the world beneath the surface and record the route and depth of every pipe and cable. It is dull, but stable.
That is, until his forty-seventh day on the job, when he found something fifteen meters beneath the old city that his instruments could not explain.
It wasn't a pipe. It wasn't a geological anomaly.
It was a “gap”: a piece missing from space itself.
From that day on, he began to see the other side of the city beneath the surface: tens of thousands of anchor points embedded underground like nails, pinning down something he couldn't understand. His colleagues seemed to have known about these anchors for a long time, but no one told him what they were pinning down.
Then he uncovered data he should never have looked into. The anchors weren't arranged to stabilize something.
