"Fire and Ice" is about gigantic glaciers and red-hot lava flows. These are rivers of energy that originate in the bowels of the earth and have shaped our planet. But with climate change, this energy regime is also changing. What is the connection between melting glaciers and volcanic activity? We accompany volcanologists who measure Iceland's glaciers and scientists who study meltwater flows on the Greenland ice sheet. Volcanoes and glaciers have a decisive influence on our climate.