Long ago, before humans existed, the world was ruled by dragons. However, when humans came along, the dragons were all but wiped out thanks to the Four Lords, mighty god-like beings who defeated them in an epic battle. The Age of Fire began, a golden age for humanity, but such prosperity could not last. A curious affliction has started to appear: called the Darksign, those it brands are cursed to become an immortal undead, forever returning from death until they ultimately lose their minds. It is said that one day, a Chosen Undead will appear, and a great change will occur in the world. One of the many undead manages to escape the asylum he was locked in, which is seen as the first sign for the role he will eventually play.