When a priest is jailed for the murder of a nun on whom he was performing an exorcism, an investigative journalist strives to determine whether he in fact murdered a mentally ill person, or if he lost the battle with a demonic presence.
In an alternate world, humanity and vampires have warred for centuries. After the last Vampire War, the veteran Warrior Priest lives in obscurity with other humans inside one of the Church's walled cities. When the Priest's niece is kidnapped by vampires, the Priest breaks his vows to hunt them down. He is accompanied by the niece's boyfriend, who is a wasteland sheriff, and a former Warrior Priestess.