Conan was the sole kid born on Remnant Island, a refugee settlement established by a handful of refugees fleeing a frightening wave of magnetic bombs that wiped out the majority of mankind. Except for Conan and the wise old man who fostered him, most of the castaways had perished after 20 years. Conan is astonished when he discovers a little girl called Lana washed up on the shore one day, believing Remnant Island to be the last inhabited location on Earth. Despite his joy at learning that mankind has survived, Lana informs him that the nation of Industria wants her as a captive in order to compel her grandpa, Dr. Lao, to power their equipment. When Industria's top pilot, Monsley, enters unexpectedly, their talk is cut short.