When the Saijou clan is left without a leader, Hoshina asks Hanzo to help him find the clan's missing female heir. Hanzo's search brings him into conflict with enemies from his past, including the Kouga ninja.

On the run from the Kouga clan, Okou seeks shelter in a remote temple. Meanwhile, Hanzo ventures to the countryside to check up on his Iga ninja. Along the way, he is reunited with Okou and battles a ninja clan who are abducting children.