In the near future, forces around the world clash over interests, entering a state of all-out conflict. Among them, Noah Technology succeeds first in developing a powerful expandable tactical exoskeleton equipment **[E.T.E]**, and builds a giant ring-shaped orbital fortress **[Heavenly Palace]** equipped with superweapons in the sky above the equator, in an attempt to monopolize the worlds resources. A huge steel structure obscures the sky, darkness covers the world, and despair spreads. ...