The Arch Angel Raziel has imprisoned the three Prime Evils, Mephisto, Baal & Diablo and for centuries the world of man has been kept safe. It is said that their dark powers once leaked from their prisons and introduced man to sin, corrupting them. Such a tale becomes evident as an Old Wanderer finds and releases Mephisto, inducing a tragic chain of events leading to man's ultimate destruction and the release of Baal and Diablo. With the Prime Evils free the world is subjected to terror, destruction and death. Only one warrior, of pure spirit and soul, can stop them.