The Bay of Naples is one of the most dangerous places in the world due to the presence of two major volcanoes: Vesuvius and the Phlegraean Fields. In addition, the proximity of other volcanoes, such as Stromboli or Etna, makes this area particularly exposed to the wrath of the earth. Volcanologists explore and model the complex geological process behind the eruptions in order to predict possible scenarios and improve their forecasts. A race against time to protect the three million people who live at the foot of these volcanoes.