1855: During the political upheavals and social strife at the end of the Tokugawa Shogunate in Japan,
the two orphan brothers Shoutarou and Gentarou Yukimura struggle to survive in these turbulent times.
Their only possession being their deceased father's sword and clinging onto their mother's final words of wisdom,
the brothers seek to embark on the Path of the Warrior: Sidooh.