Suddenly, an overwhelming army of demons began to sweep across the continent of Astria, devastating human nations in an instant.

The scale and organization of the demonic forces were unlike anything recorded in the continent's history. They moved in formation and launched coordinated attacks. Skilled in stealth, the demons first assaulted the royal palaces of each nation, exterminating high-ranking nobles and royal families.

With their central figures gone, the human nations did not last long. The strongest empire was the first to fall, followed by the gradual collapse of the kingdoms, one by one.

The Holy State in the heart …