Alexander and Ivan - sound engineers; a thundering train took them to Transbaikalia. They thought that this would be another expedition, that they would record the necessary sound atmospheres and, having done their job, would return home. Their main goal was to record in the Marble Gorge, a rotting camp hidden deep in the mountains, a fragment of the Gulag. But what they heard and recorded was not at all what they expected. Everything around them that seemed inanimate, gone, began to acquire its own voice.