In a distant future after the devastation of Armageddon, a persistent war rages between vampires and humans. To safeguard humanity from vampire threat, the Vatican must enlist allies to counter the danger. Abel Nightroad, a traveling priest and a crusnik who consumes vampire blood, serves in the Vatican’s special operations unit, the Ax, commanded by Cardinal Catherina Sforza. During his missions he meets Esther, a young girl who joins him in Rome to train at the Vatican. Shortly after their encounter, the Order of Rozencreuz, led by Abel’s twin brother Cain, intends to continue the conflict in order to seize world domination. It...