This remake of the classic film features the addition of Chiba Shinichi and Natsuyagi Isao as political intrigue reigns supreme. Tadanaga, the younger son of Shogun Hidetada has signed a dangerous pact with the intention of preventing his older brother Iemitsu from taking his rightful place as heir to the shogun's seat. During the early years of the Tokugawa shogunate highly skilled ninja groups carried out secret missions, and it falls upon Iga Jigoza's force of 17 ninja to infiltrate the enemy's stronghold and steal the pact from Negoro leader Saiga Magokuro.