[DeepL Translation - needs review] In the Edo period (1603-1867), Tokugawa Ieyasu, the ruler of Edo, decided to pit the two major ninja clans, the Kouga and the Iga, against each other to settle the question of who would succeed as the third shogun by deciding who would survive the ten-man battle of ninja killing. However, the heirs of the two hated families, Gennosuke of Kouga and Oboro of Iga, are deeply in love with each other. The curtain rises on the cruel fate of these ninjutsu warrior...
