England is swarmed with vampires and ghouls. There are some that would stand against these evil forces to protect the country and their queen. This is known as the secret government organization called “Hellsing.” Hellsing is headed by a woman named Integra Hellsing and is aided by a powerful ancient vampire by the name of Alucard. They first met when Integra inherited the organization from her father, but her uncle tried to kill her to take control of Hellsing. Integra has no other choice but to venture down the dungeon underneath the castle to seek help from Alucard. He agreed to kill her uncle and his henchmen and now, continues to serve her.
One day, Alucard is called to duty when a vampire is posing as a priest. He is forced to kill Seras Victoria, a police officer because she was used as a shield, but then he offers her to become a vampire which she accepts. Seras Victoria then becomes Alucard’s “sidekick.” At first Seras struggles with her powers and bloodlust but learns to tame them and turns into a helpful asset to the Hellsing.