Hellsing revolves around an organization in England run by the Hellsing family. They are known as the Royal Protestant Knights and have been entrusted to protect England from the undead through the centuries.
Sir Integral Wingates Hellsing (yes, Sir is actually a woman) is now the leader of the Hellsing family. Her most important tool (besides her private special forces army) is a vampire known as Alucard.
His connection to her is not immediately apparent. In fact, little other than his impressive abilities in the realm of death and destruction are revealed at first. Arkard is quite the elitist and regularly humiliates his undead brethren before sending them to their maker. He walks the line between service to Sir Integra and the living souls of England and his darker nature throughout the series, and for most of it we all wondered how this powerful a vampire happened to be working for the anti-undead league itself.
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In the first episode (or "Order"), we are also introduced to a policewoman named Seras Victoria, the other main characters are Walter, the Hellsing family butler, and Ferguson, the head of Hellsing's private army.
The story moves to a conclusion fast. You are quickly introduced to all the important characters, and soon after that a buildup occurs toward the ending. Nevertheless, the story is quite entertaining and serves to allow a great deal of delicious fight scenes.
As for the music, the opening and ending themes are quite catchy, most of the music played during the actual episodes is also well selected. The soundtracks, "Raid" and "Ruins", are mostly filler. There are a few songs good enough to listen to on their own.
Hellsing follows the antiheroic vampire, Alucard, and a police girl-turned-vampire, Seras Victoria, two vampires employed by the vampire-extermination group of England, the Hellsing Organization. Slowly but surely, through their active duty, they find a new breed of vampires beginning to arise.
"In the name of God Impure souls of the living dead shall be banished in to eternal damnation. Amen".