A steel samurai blade that was to be given to the American ambassador by the Emperor of Japan is stolen. American sailors and Japanese samurai are sent to find it.

The story of a high school boy (Toshiyuki Nagashima) in Tokyo returning to his home town of Nagano upon the death of his father.

Following the death of the second Tokugawa shogun, it is revealed that he was poisoned by retainers of his son Iemitsu in hopes of gaining him the shogunate despite the stammer and birthmark which undermine his respect. Iemitsu and his brother Tadanaga become bitter rivals for the shogunate, and the land is split into factions, eventually erupting into warfare. Iemitsu's mentor, his fencing instructor Yagyu, is fixated upon securing Iemitsu the shogunate and ends up betraying everyone, even his own family, in pursuit of the goal.

Jiro Takimura, a painter, falls in love with Marie, a beautiful married woman who is studying painting abroad in France.

During the Edo period, Henshin Ninja Arashi and his allies fight for peace. (extended version of episode 6 of the TV series)