In 1883, the volcanic island of Krakatoa erupted with a force equivalent to 150 million tons of TNT, a cataclysmic event that reverberated around the globe. This film explores the eruption's profound impact on the region and the scientific community, as researchers and survivors piece together the story of one of history's most famous volcanic events. Through the eyes of those who witnessed the disaster, the film examines the terrible power of Earth's natural forces and the first tentative steps toward understanding them.