Armageddon… The ultimate sin of humanity, perpetrated upon itself, which cast the shroud of death across the world centuries ago. And out of that lasting darkness, they emerged… From the legends of ancient times, they have been called forth into the world anew… Vampires.
Two races, Terran and Methuselah, human and vampire, are locked in a struggle for existence, trembling on the brink of war. Some seek the path to a peaceful coexistence, while others pursue a dangerous shift in the balance of power… And the world’s enemy, Contra Mundi, is starting to move. Cooperation and goodwill between the two races may be their only chance for survival.
The background is in the distant future after the destruction brought about by Armageddon. The war between the vampires and the humans continue to persist. In order to protect the humans from the vampires, the Vatican has to rely on other allies to counter the situation. The protagonist, Abel Nightroad, is a traveling priest from the Vatican and a crusnik, a vampire that drinks the blood of vampires. He is a member of the “Ax”, a special operations group led by Cardinal Catherina Sforza. He encounters a young girl called Esther, who decides to go with him to Rome and train at the Vatican. Soon after he meets her, the order of Rozencreuz, led by Abel’s twin, Cain, tries to continue the war so they can rule the world. It’s up to Abel and the AX to try and stop them.
In a post-apocalyptic future, Abel Nightroad does occasional dangerous work for the Vatican, to whom he is extremely loyal. While the apocalyptic war has long been over, humanity is still entrenched in a shadow war against the vampires. Lady Catherine, the leader of his operations group “AX,” seeks to prevent a renewed full-scale conflict, but there are many forces on both sides bent towards war. As Abel and the rest of AX try to stop this, he encounters a young girl who will be the key to humanity’s survival or demise. Now, Abel must not only fight for humanity, but also try to face his regrettable past…