The year is 3451, humanity encounters another lifeform. We call them Elementals. They have the ability to transform into monsters. For 250 years, humanity has lived alongside them in peace until the colony planet Continal is attacked. The UE, United Earth, declares war upon them. The Hierarch Ayvrir leads his people in a desperate war for survival. The Vanguard, genetically engineered super soldiers, are called in to aid the destruction of the Elemental peoples. Their clash leads to the discovery of a sinister plan from the God of Darkness, Aghior, to begin an event called Nightfall.