With her heavy boots, respirator and face mask, Patrizia's descends into a black hole 500 meters below sea level into a mine. She was twenty years old when her father, a miner who died of silicosis, accompanied her here for the first time. One can still die easily in the mines today -- if firedamp, a highly flammable gas, hisses forth, one either suffocates or finds oneself buried under immense masses of rock and iron. Patrizia's job is to keep this gas under control, and to do so, she needs to walk the labyrinth-like mine tunnels alone. As Patrizia guides us into most impenetrable places, she provides us a glimpse into the souls and stories of her fellow workers.