There was a building at the center of a city I did not recognize. Scaffolding had wrapped it for so long that nobody remembered the rooms.

At some point the inner walls had been removed, or perhaps they had dissolved under the weight of the supports. The pipes had become corridors. The platforms had become floors. Safety netting served as windows. The people inside climbed iron ladders believing they lived in apartments.

I stood in the courtyard below. I could hear ordinary life above me: dishes touching tables, half a conversation, a television left on in another room. I looked up and knew there was no building. Only scaffolding.

The support had become the thing it was meant to support, and nobody inside could see it because there had been no single moment of replacement. Amplification had turned into substitution slowly enough to erase the transition itself.

Then the workers arrived. They spoke dozens of languages and wore stained overalls. They carried no manifesto. They placed their bare hands on the metal at the base.

The whole structure began to resonate.

It was a low sound at first, a structural hum climbing through every pipe and platform. The tenants stopped. A plate remained suspended halfway to a table. A fork froze in the air. For the first time they could hear that their home was not a home. Nobody had explained it to them. The metal had transmitted what the walls never could: its own natural frequency.

The scaffolding vibrated like scaffolding, not like a building.

A man stood at the top. He had always known. He knew every brace was temporary, every landing borrowed, every room an agreement pretending to be masonry. But he did not know what to do with the knowledge. He had mistaken seeing the trick for escaping it.

The sound reached him too. By then he had forgotten how to vibrate in return.

The workers below had no theory of the structure. They had hands on the metal and a frequency in their bodies. That was enough.

The antenna was not awareness of the gap. The antenna was contact.