The Holy See has always been aware of the existence of vampires, but it was only recently that it finally made up its mind to send a group of vampire hunters to eradicate this group of confidants. Jack Crow is a member of this group of hunters. When he was a child, he witnessed his mother's tragic death at the hands of a vampire, and the seeds of hatred have been rooting in his heart. He was hired to destroy a 700-year-old vampire Varette. Because this vampire possesses extremely high mana and he is about to seize a black cross, his descendants of vampire apprentices who follow him can also run wild in broad daylight. Although Jack used various methods to eliminate many vampires, he did not expect that Valet would have obtained the black cross one step earlier, and most of Jack’s companions had already died on the battlefield. However, Jack knew that the vampire leader, Valek, who was more than 700 years old, was working. To plan a big move, he must take back the black cross from Valek, otherwise the vampires will be infested during the day. There are only two helpers left beside Jack, and one of them is bitten by a vampire and will soon become a vampire.