High school student Shu Hiiragi is drawn into a violent supernatural conflict when he becomes caught up in a werewolf attack in the city. He is rescued by a mysterious, beautiful woman who dispatches the werewolves with a gun and her bare hands. Shu immediately recognizes her as the figure who appears in his recurring dreams—a person tied to his lost memories. Her name is Wilhelmina Harker, and she is a vampire. Shu soon learns that werewolves have been secretly hiding among humans and silently ruling the city from the shadows. Confronted with this hidden war between monstrous factions, Shu resolves to take up the fight to protect the city and uncover the truth behind his forgotten past. The story unfolds as a supernatural action thriller, with Shu caught between vampire allies and werewolf enemies, all while struggling to piece together the connection between his dreams and Wilhelmina.