The peaceful age of Earth ends abruptly when a mysterious extraterrestrial faction, the Abyss Clan, invades from deep outer space. Cities collapse, civilizations fall into ruins, and mankind stands on the brink of annihilation.
To resist the powerful alien foe, humans pool all their scientific and technological achievements, building heavy armaments and defensive lines.
An endless racial war erupts across the planet. Even trapped in broken wastelands and dark underground shelters, humans cling to hope firmly.
They fight not only for survival, but to carve out a brand-new future for their species.
