Nine hundred years after Armageddon, humanity's fragile peace with the vampiric Methuselah runs through two rival powers: the Vatican, guarding the human world, and the New Human Empire, the vampires' government in Byzantium. Abel Nightroad, a Crusnik who feeds on vampires himself, works undercover for the Vatican's AX unit alongside its steel-willed leader Cardinal Caterina Sforza, against the Rosenkreuz Orden, a terrorist order of humans and vampires alike that wants a new war between the two powers. These six volumes collect short-story missions set before the main Reborn on the Mars sequence.