During the reign of the 11th Shogun, a series of supernatural incidents occur every night in the Edo Castle. A beautiful inspector appears with thunder and lightning to suck people’s blood and kill them. The examiner’s true identity is Amakusa Shiro, a young samurai from the Amakusa clan that was destroyed by the harsh Christian persecution of the Shogunate. Shirō sold his soul to the devil and became an evil spirit. After 160 years since destruction of Amakusa, his revenge to overthrow the Tokugawa shogunate begins.