Hissatsu shikakenin (1972)

"Shikakenin", they have a double life and live inconspicuously in Edo. Baian Fujieda is an acupuncturist. Sanai Nishimura is a masterless samurai. They believe that Otowaya-Han'emon who is a fixer said "Kill the target for the public good", work as assassin at the risk of their lives.