On July 14, 2100 AD, a sudden fire from heaven fell on the earth. Houses were burned down, forests were burned, oceans evaporated, animals became extinct, and the world was in chaos... The land that humans depend on for survival turned into a scorched earth because of the fire from the sky. The green that was once everywhere has become a luxury for humans. The government established a survivor base and struggled to survive relying on the remaining grain reserves...