One of the legends is of the Noah Stone, which is said to bring prosperity to any nation which possesses it, and has therefore been the source of much conflict.

A vision calling herself Irmina appears to all inhabitants of the world, warning them that they will soon enter an age of darkness.

Thirteen million years ago, on Diaros, the High Civilization of the Mora Clan flourished thanks to the Noah Stone.

Ten years into the future, due to the ensuing events, war has erupted, the Age of Darkness predicted by Irmina.

The war is the result of secret manoeuvers by the Mora Clan's Igo, who has put various strategies in action to take possession of the Noah Stone.