It tells the story of the famous French "volcano couple" Katya and Morris. Katya and Morris are volcanologists. They fell in love with volcanoes since childhood, and the same aspirations and hobbies brought them together. They have devoted their lives to the study of active volcanoes, covering all the volcanoes in the world. In 1991, the two men boarded Japan's Yunxianyue volcano and died in the sudden eruption of the volcano. Katya and Morris left a large number of video files, and in the rescued images, they can be seen recording and broadcasting the eruption of the volcano even at the last moment of their lives.