Meet the A-66, a group of vampire hunters from the Holy State of the Vorhersage, a theocratic nation founded on faith and obedience. One day, the number of vampires begins to decline drastically, just as an order of powerful ancient vampires emerges in the heart of Vorhersage, setting in motion a plan forged centuries ago. Amidst vampires, monks, nuns, and smoke... can A-66 unravel the secrets of this world?