On Planet Huth, the nation has long been divided between the upper class citizens and the lower class people. In the last several years, the war has become even more intense with the advent of the weapon called the Battle Nizer. Lili, an upper class citizen, is a young girl confronting the lower class people as a mob suppression unit, while questioning her duties. During her mission, she recklessly jumped in alone to save a young girl from a monster summoned by a Battle Nizer. At that moment, a mysterious black man appeared between her and the monster...