During a mission to eradicate a vampire priest and his minions, Alucard is forced into a difficult decision upon encountering an injured police woman. Later Alucard encounters a mysterious warrior from the Vatican.

Two daring vampire brothers lead a violent raid on the Hellsing compound. The carnage is great, but Alucard and company manage to gain a key piece of information while turning the battle’s tide.

The Hellsing organization resorts to the recruitment of mercenaries in the wake of a devastating attack on headquarters, and Integra’s suspicions concerning the origins of their enemy are confirmed.

An important meeting between Hellsing and the Queen is interrupted by tidings of impending war. Meanwhile, Alucard is sent to deal with the deviants responsible for the hijacking of an aircraft carrier.