The story took place at the end of World War II. Tsubasa, who was living in seclusion in Moriyama, received a return notice from the "Association" one day. The reason was that her former partner Mary was assassinated, and the Association needed her to investigate the case.
In order to avenge her former best friend, Tsubasa left Moriyama, who had lived in seclusion for five years, and boarded the train to London alone, heading to her best friend's hometown, where she encountered various strange mysteries one after another.
The werewolf in the forest, the red witch, the cursed Enterprise, and what does "Etihw" mean?