In a deadly brawl, Fuu meets two fighers – Mugen and Jin – who have incredible skills with the sword. Mugen is an unruly wanderer from Ryukyu who lives by his isntinct rather than his intellect. Jin is a disciplined former student of the Mujuushin school of swordplay, and carries himself with a calm, controlled demeanor. They are polar opposites, but Fuu enlists them to help her find a samurai who smells like sunflowers. Along the way, they get caught up in government intrigue, assassins, bad mushrooms, and everything in between.