The series follows the adventures of Sabu, a young Edo bakufu investigator traveling with the blind master swordsman Ichi. In their travels, they assist the common people in solving mysteries and righting wrongs (usually committed by bandits or corrupt officials). Sabu is engaged to Midori, the daughter of his boss, who works as a police officer for the Tokugawa shogunate.

The series was serialized originally in "Weekly Shōnen Sunday" beginning in 1966. In April 1968, the series moved to serialization in the first issue of "Big Comic", where it was published until the series ended four years later in the 10 April 1972 issue. (from Wikipedia)