Kugayohito is a vampire hunter who belongs to the Hellsing Foundation. His targets are vampires who hide in the darkness and prey on people one after another. Its identity was a virus. Those who gained tremendous power from being infected with the virus continued to increase their casualties as they desired. The caller goes to battle with his partner Hyuga to eradicate the vampires, but he has a great "secret" because he has the ability to surpass ordinary people.