Kijo to Zoku Ken Kyaku Doshin Oyako Bune (Jidai Shosetsu Bunko to)

[Machine Translation] Hayato Nagatsuki, a secret agent of the Minamimachi Magistrate's Office, is practicing swordsmanship with his eldest son, Kikutaro, an apprentice agent, when Risuke, an Okakkobito to whom Hayato has been handing out handbills, arrives. Hayato was told that there had been a break-in at Matsunagaya, a kimono store in Nihonbashi Hongokucho, where his handler had been brutally murdered and a large sum of money had been stolen. Hayato, who thought it was a big case, and Kikutaro immediately went to the scene of the crime. The only clues they had were a sword wound left on the body of the slain Teyo, which was probably caused by a blow from behind, and the fact that he was wearing a Hannya mask. Hayato and the fast-growing Kikutaro are together in pursuit of the bandit's true identity! A masterpiece of the sword-slaying age, this is a masterpiece of father-son swordsmanship.

南町奉行所隠密廻り同心・長月隼人が、嫡男で見習同心の菊太郎と剣術の稽古中、隼人が手札を渡している岡っ引き・利助がやってきた。日本橋本石町の呉服店「松永屋」に押し込みがあり、手代が惨殺され、大金が奪われたという。大きな事件と踏んだ隼人は、菊太郎とともにさっそく現場へと向かった。手掛かりは、殺された手代の体に残された背後からの一太刀であろう刀傷と、般若の面を被っていたということのみ。隼人と成長著しい菊太郎が、ともに賊の正体を追う!父子の剣が悪を斬る傑作時代長篇。