The story takes place in an alternative world line where America failed to develop the atomic bomb. This resulted in WWII to drag for longer, and USA and Russia conquered the northern and southern parts of Japan, before deciding to stop to avoid conflict between themselves. As a result, central Japan retained independence, but this gave rise to a xenophobic surge that had heavy social and political impact. For the last 30 years, "The Sword Hunt", a law that prohibits the use of firearms, was imposed on Tokyo, along with a huge wall, to avoid foreigners to get in.
This is the story of Takeda Akane, a young swordsman working for the biggest economic group in Tokyo. However, his primary goal is to face his eternal rival Igarasu Yoshia, regardless of the cost. Yoshia, on the other hand, seems to hold a deep grudge against Akane that can be only settled with a duel to the death.
