ご存知！旗本退屈男 長崎 死の密書！

Mondosuke ventures alone into the land of Nagasaki. There, he encounters young lady named Kinue, the daughter of Nagasaki's former magistrate office constable, Shusuke Kaneko. Monsuke has received information that Shusuke has been captured on charges of embezzlement, prompting him to head to the magistrate's office. However, the arrival of the Chief Inspector, Shigehide Ogiwara , obstructs Monsuke's actions.