Shu Hiiragi is caught up in a werewolf incident in the city, but his life is saved by a mysterious beauty. The true identity of the beautiful woman is the person Shu sees in his dreams, the person of his lost memories.... That person's name is Wilhelmina Harker, a beautiful vampire. Werewolves are quietly hiding among the humans and ruling the city. When Shu learns of this, he makes up his mind. He decides to fight in order to protect this city.