A luckless geisha struggles to make a living for herself and her young son.
After mastering swordsmanship at the dojo of Chiba Shusaku, and unable to serve a clan due to his illness, Hirate Miki becomes a ronin who winds up as bodyguard to Shigezo of Sasagawa leading up to an epic battle.
Police detective Heiji is assigned to catch the masked Maboroshi gang of robbers who have terrorized all of Edo leaving few clues as to who their leader is.
