An eternal war has been waging between the Light and the Darkness. Demons from the Abyss have attacked Skyworlds impenetrable gates many times over the centuries, every attempt had failed. Dameus, leader of the Abyss and all the demons that dwell in it, devised a plan to open a gate that leads to the Human world. Seraphim and Angels are bound by Celestial magic to protect Humans from the darkness' impurity. With much blood and sacrifice, Dameus had succeeded in opening the gate...bringing forth the Apocalypse.