Xahn and his sister Dahn, young adult twins from the mining town of Hylan, are swept into a war between the humans of Neworld and the evil demonspawn who have descended from the Heavens. Guided and trained by Ekatern the Green Crystal Witch and the Fallen Angel Tenac, the twins must leave the safety of their home and each other to face terrible foes as they struggle to survive, to defeat the demonspawn, and to discover who they truly are.