A volcano is where Earth delivers up its messages. Tectonic movements, harmless vapors, toxic acids, scalding minerals and the possibility of new geography. Basalt becomes infrastructure, architecture or souvenirs. The film follows a team of INGV volcanologists to their data centers near the peak of Mount Etna (Sicily, IT), but pays equal attention to the miners and shopkeepers working on its slopes. The result is an expanding tableau of the mountain's erratic economies.