There was a war that broke out between Heaven and Hell, and because of this war Angels and Demons are now widely known, as well as many other supernatural creatures. The one thing that could end the war was the Valen Aes, a sword so powerful that God himself had to sacrifice his life, along with a human's, in order to create it. With this sword the Angels sent the demons back to hell. But the sword was too powerful to keep in Heaven, and it would be destructive if it fell into the wrong hands, so the sword was given to the humans to hide. Before God sacrificed himself, he created a void...