[4] It is based on Futaro Yamada's novel of the same title and 2nd in his Kunoichi film series.
[5][6] The plan to overthrow the Tokugawa Shogunate, led by Yui Shōsetsu and Marubashi Chūya, failed.
Matsudaira Nobutsuna sensed the movement of Yui Shōsetsu and had Hattori Hanzo search for the funding source.
As a result, Matsudaira Nobutsuna learned that the billions of treasure left by the Toyotomi clan had been hidden.
He sends Amakusa Senchiyo and his subordinate to Nagasaki to find the treasure.