幕府时代末期，外忧内患，山河动荡，百姓生活困苦，且生命时刻受到威胁。少年心太因其善良纯洁之心感动飞天御剑流高手比古清十郎，被其收入门下学习剑法，更名剑心。 在国家危难之际，年轻的剑心怀揣改变时代的梦想下山，加入奇兵队，日后更被桂小五郎纳入麾下，以刽子手的身份为时代的变革尽一份绵薄之力。年仅15岁的剑心接连刺杀多名政府要员，令对手闻风丧胆，直到某一天，一名下级武士在他的脸上留下一道无法愈合的伤疤。 来至京都寻找爱人的雪代巴邂逅了剑心，正是眼前这名瘦弱的男子将爱人从她的生命中带走。巴走入剑心的生活，随之经历了政治斗争的血雨腥风和田园乡下的宁静淡雅。也许她正是剑心那把狂舞之刀的刀鞘，但在大时代的背景之下，两个人的渺小幸福一触即碎……

In 1868, after the Bakumatsu war ends, the ex-assassin Kenshin Himura traverses Japan with an inverted sword, to defend the needy without killing.

Kenshin has settled into his new life with Kaoru and his other friends when he is approached with a request from the Meiji government. Makoto Shishio, a former assassin like Kenshin, was betrayed, set on fire and left for dead. He survived, and is now in Kyoto, plotting with his gathered warriors to overthrow the new government. Against Kaoru's wishes, Kenshin reluctantly agrees to go to Kyoto and help keep his country from falling back into civil war.

Shishio sets sail in his ironclad ship to bring down the government. In order to stop him, Kenshin trains with his old master to learn his final technique.

陸奥圓明流外伝　修羅の刻 第一部　宮本武蔵編 时值江户时代初期，在德川幕府刚刚完成统一的日本国内，是一个乱世中还拥有着理想的人们比拼自己本领，赌上自己生命战斗的时代 在这些人中，有着最高呼声的巨人“宫本武藏”遇上了“修罗”。这是一场以最强者为目标的，男人之间宿命的对决。