Set at the close of the civil wars that led to the unification of Japan in the 17th century. Tokisada Shiro Amakusa is regarded as the Son of God by a group of Christians rebelling against the newly established Tokugawa Shogunate. Jubei tries to negotiate Shiro's surrender to end the rebellion, but fails. The resulting slaughter of Shiro's followers sets in motion a complicated plot involving a prophecy that if the new Savior is rejected, he will be reborn as Satan.