Maurice and Katia Krafft are volcanic vagabonds who devote their lives to studying and recording eruptions on film. They have visited 140 in the last 20 years, more than anyone else in history. Wearing protective space suits, they walk carefully, but with ease, as they film an study the molten world. Still, the danger they are facing are not to be underestimated: for example, Katia Krafft must be careful that her microphone does not melt while she is recording the sounds of the flowing lava. The Kraffts' work is useful for those who live in the shadow of a active volcanoes as it provides them with valuable information about their slumbering neighbour.