江戸の刺客・大坪左源太は奉納試合への道中、何者かに襲われて倒れる。そこに現れたのは白づくめの美剣士・源氏九郎だった。九郎は左源太の遺言を聞き、名刀火焔剣を持って奉納試合に向かうが、行く手には幕府隠密の刺客団が待ちかまえていた……。中村錦之助主演、柴田錬三郎原作の人気時代アクション。Master swordsman Genji Kurô is a master swordsman and entrusted with protecting the ancient sword Kaen by the Otsubo family. Being part of a valuable pair of swords made by a legendary sword maker, the Otsubo family tries to reunite the swords Kaen and Suien at the Mishima Shrine. The journey to the shrine is however full of peril and danger as a ban of ruthless thieves are interested in the swords.