There is a war between Mankind and Devils 500 years ago in the World called 'Eden'. Should the Devils wins then Eden will be no more, but the God didn't stay quiet. The God Blessed Mankind with 4 Crystals called 'Crystals of Power' that grants Heavenly Weapons and Armors for those who's Chosen. The 'Chosen Warriors' Wins with the Blessings of the God and the Devils left Eden for good, Until 500 years latter the Devils suddenly back and the war rage on once more.