Three years earlier, a gateway to the other world opened in New York. With that, the separation of the two worlds was broken and New York became Hellsalem's Lot. In this infernal melting pot, humans meet monsters, everyday life meets the paranormal. To create a balance between the two sides, the secret society Libra was formed. Through a misunderstanding, the photographer Leonardo Watch ends up in this society. Leonardo received an all-seeing eye from one of the mysterious monsters - at the expense of his sister, who is now blind.
"Blood Blockade Battlefront" has an interesting story lined with impressive battle scenes and is quite funny here and there.
Like others here in the comments, I unfortunately have to say that the story is unfortunately very often ignored, so that you later have problems finding a connection to it again.