A Tokugawa Daimyo rebels against an his lord after the battle of Sekigahara. Samurai Matabei, a famous spear fighter and warrior, is a vassal of lord Honjo. One of Honjo's most trusted under-lords is Sanzaemon. He has designs on Matabei's fief, and he plots to kill Matabei. He finally convinces Lord Honjo of Matabei's guilt. Now Matabei must fight to survive.

In the fifth installment, Yagyu Jubei must prove the innocence of his family who is suspected of conspiring to take Shogun's life.