In the year 3000, the world is highly unified. That year, the superpower standing at the pinnacle of the world, the [Redacted] Empire, turned the Far Eastern island nation of the Chaori Empire into one of its territories. The fall of his country and the destruction of his family left Atong Ge San, the last prime minister of the Chaori Empire, overcome with grief and rage. He ultimately expressed his resolve by committing seppuku. His son, Atong Aili, swore to avenge his father, but unknowingly found himself drawn into terrorism. Meanwhile, within the [Redacted] Empire on the East Asian continent, the time machine people had long dreamed of surfaced alongside the mysterious prince who had vanished years earlier. What opportunity does the time machine represent? How will two strangers begin their struggle? And how will it all end?