God's Apocalypse

In the year 3500, a great calamity had befallen the human race and all other life on earth. Though no one knows what caused this, animals suddenly started mutating into beasts. They became increasingly aggressive and territorial. Many humans lost their lives to these beasts, and as time went on those who survived began creating small villages. Leaving earth's plant life to once again take hold of the cities. Then, almost as suddenly as the beasts had appeared, higher beings that called themselves "gods" also began to appear. The beings had no form that any man could see, but they offered great power and protection from the beasts in return for the people's worship. A young girl named Circe had grown up in one of the small villages of this world.