正月吉原。外出观赏花魁道的捕鸟们看到了忠相（东山纪之饰），并传出了谣言。之后，连续杀人事件发生，目击者指称忠相是凶手。另一方面，与忠相长得一模一样的浪人月嶋左内（东山纪之饰）在吉原的妓楼做保镖。樱木太夫（本假屋ユイカ）担心左内被工咳折磨的身体，看穿了刽子手是左内所为。左内打算为樱木太夫报仇。那时，老中的松平左近将监（田村亮饰）命令北街奉行的伊生（高桥光臣饰）寻找杀人事件的凶手。一连串的杀人原因是对松平家的怨恨，据说家老的黑崎监制（板尾创路）接下来将被瞄准。不久左内袭击了黑崎。忠相出现在那里，和左内一对一的讨伐。

The special edition and the third edition of the "Ooka Echizen", starring Higashiyama Noriyuki, will be broadcast during the new year of 2021. In this SP, Higashiyama Noriyuki will play two roles. It is a swordsman who drives the blade to use it for revenge of a pathetic prostitute. How does the confrontation confront the man who is very different from the circumstances and is different in the circumstances? You can find the answer in this SP.