When battling ex-colleagues that turned into ghouls, female D11 operator Seras Victoria is critically wounded. Alucard who accompanied her in the battle, turns her into a vampire to save her life.
Two thrill seeking adolescent vampires massacre families across the city. The hellsing organization closes in on the two and thus a test is set for Ceras to prove herself worthy of working with the hellsing organization.
A computer chip implanted on a human allows them to be artificially turned into vampires. After policemen were killed, Seras goes along with a Hellsing paramilitary squad to take him out. A Vatican-based priest appears in the scene.
A Snuff film featuring a man being killed on screen by a Vampire also has a Hellsing soldier in the background, which forces Integra to deploy Hellsing and Seras to investigate the film and find out who is responsible for broadcasting it.
Seras and her a team raid a warehouse district after reports of a supposed cult emerge. Integra attends a covert meeting with a secretive government organization when two vampire brothers launch a surprise attack on the Hellsing mansion.
The Two brother vampires Luke and Jan are now in the mansion, with there ghouls Most of the forces are wiped out, except for the three vampires, and a "great" duel occurs between Alucard and Luke.
Integra attends the funeral of her dead subordinates. Meanwhile, Seras Victoria and a Hellsing squad led by Mason Fox engage in battle against a vampire after he turns the civilians in the London Underground into ghouls to hold them off.
A Hong Kong factory producing chips is destroyed. Integra and Walter are forced to train new recruits from non-British special forces personnel in order to maintain the manpower. Seras and an MI-5 secret agent investigate on their own.
An illusion is taking over the place, and no one is being himself Integra's sister is visiting her A fight is about to start between Alucard and a stranger that makes a very worthy opponent to him.
Ceras is having dreams of some vampire that reflect her feelings about the new life that she is living, so she goes to Helena to see if she can help her. There is a big meeting with the queen that will be arranged some where secret.
The army is attacking the HQ of Hellsing that was betrayed by the other knights, and now they are trying to make it vanish like it never happened Everyone is fighting his enemy.
Alucard, in the Tower of London, faces against an undead named Incognito. Integra and Walter try to head out there, but are facing trouble from the British Army. Despite being overwhelmed by Incognito, Alucard manages to defeat him.
