Hellsing is a manga series written and illustrated by Kouta Hirano. It is about a powerful vampire named Alucard and his battle against supernatural forces in service of the Hellsing Organization. The manga has two animated adaptations. One is a television series by Gonzo which was produced early in the manga's original run and is largely based on the original screenplay by Chiaki J. Konaka. The second, Hellsing Ultimate, is an original video animation series produced by Geneon that closely follows the manga's storyline. The series takes place primarily in the United Kingdom, which is under attack by the undead forces characterized as a rogue Nazi battalion which survived the end of World War II.