A hard working salaryman takes off five days from his busy job and sets off with his wife and two children to visit his parents in his hometown for the 1991 new year holidays. He decides that they will go by car to save on expenses. Unfortunately, the long drive from Tokyo to his hometown becomes a much longer journey than expected due to traffic, sickness and other misfortunes and by the time they arrive three days later, they only have time for a short but happy visit.

小川英二は8年の刑期を勤めて出所後、八田興業を壊滅させる。舎弟の常吉は組長・湯沢を射殺して服役中であった。身寄りも仲間もいない英二は、西にいることしか分かっていない10年前に姿を消した妹のあずさを捜すため、単身九州を訪れ熊本にたどり着く。 かつて世話になった松のところに身を寄せ、熊本の組織である村川組に世話になるが、松はそのことに反対する。熊本で日本語を喋ることもできない若く美しい中国人女性・梅花（メイホウ）と出会う。英二の部屋から帰ろうとしない梅花を追い払おうとするが、やがて魅かれ合う。 しかし、梅花は日本に密入国した身であること、村川組に騙され、売春婦をさせられていることを知り、梅花を村川組から救い出そうと決意する。あずさが鹿児島にいることを知った英二。既に結婚していたあずさを訪ねて鹿児島に出向くが、あずさもかつて同じように村川組から酷い仕打ちを受けていたことを知る。その頃、梅花には村川組の魔の手が迫っていた。 英二は梅花、そしてあずさの復讐のため、単身村川組に乗り込んでいく。

A young samurai stuck at the bottom of the hierarchical order attempts to rescue his childhood sweetheart from an evil clan lord after learning of a plot to kill her and her infant child. Bunshiro Maki is a skilled swordfighter who's lethal with a blade, yet still can't rise through the ranks of the system. After his father is accused of plotting against his clan and forced to commit ritual suicide, his longtime love Fuku is sent to Edo to become the clan lord's concubine. A few years later, Fuku has bore the clan lord a son. When Maki learns that the clan has hatched a plan to kill Fuku and her son to secure succession to the throne, he recruits two childhood friends to help thwart the diabolical plot.