Feudal Japan becomes another front in the hidden war between the Assassin Brotherhood and the Templar Order as Templar influence spreads across the country. An Assassin and his young apprentice travel to Iga, birthplace of ninjutsu, seeking help from renowned shinobi including Hattori Hanzo and Momochi Sandayu. Their alliance with Iga’s ninja becomes part of a larger effort to stop the Templars from tightening their control over Japan.