Samurai Vendetta in Iga.

Matauemon Araki (Kotaro Satomi) is a sword teacher in Yamatokoriyama. He heard from his brother-in-law Kazuma Watanabe (Koyo Katagiri) that Kazuma's father was killed by someone. The murderer was named Matagoro Kawai (Jinya Sato) who was the nephew of his close friend Jinszaemon Kawai (Isao Natsuyagi). He came to help Kazuma who is not good at swords and chase Matazaburo.