In Edo period-Japan, the Yamashiro clan mines gold in secret, and sends a shipment to the House of Toyotomi Shogun of the Dark as payment for his protection. The Shogun of the Dark intends to use the gold to buy advanced Spanish weaponry and overthrow the current government, the Tokugawa Shogunate. The ship runs aground onto Mochizuki territory in a storm, and the Eight Devils of Kimon, a ninja team with supernatural powers in the employ of the Yamashiro, kill the people of the nearby village of Shimoda to keep the gold shipment a secret.