In 2177, humanity's wanton destruction of the environment, endless waste and abuse of resources, and ceaseless wars brought down a sudden natural cataclysm upon human civilization. Both the ecosystem and human civilization were reshaped. Thousands of years of human history were utterly destroyed, without leaving a trace. After enduring this calamity, humanity
rebuilt its civilization. Nations clashed, explorers ventured into unknown, uncharted continents, and people sought to learn about the civilization that came before. In the end, they discovered the cause of the disaster.
