When the old lord Yoshizane SATOMI was attacked by an assassin in Mt. Toyama, Daihachi, who had been raised by God Princess Fuse, came to his rescue, calling himself Shinbe INUE.
富山で刺客に襲われた老侯里見義実の前に、伏姫神に育てられた大八が犬江親兵衛と名乗り現れる。