A ragged man appears in the town of Edo. From the beginning, the man helps a sneaky thief named Kita. In gratitude for "helping" him, Kita gives the man who has lost his memory the name of Nanashi, Kyogen author Genma , and rogue Ora brothers involve them begin to search for clues to their origins. What is known about Nanashi is that mysterious swordsmen are trying to kill him. Each time, he seems to have returned with his overwhelming swordsmanship. He can't even remember why he's so strong. However, when he heard the name of the Shade Party who had done all the bad things in town, reminds him of the death of a loved one that remains in his memory since. At the same time, Kurama Shido and Saratsuki Migo, are about to put a plan into action. Memories of the death of a loved one, an extraordinary sword skill, and mysterious assassins who are trying to take his life, and apparently, there is something about this man.