Kodaira Mochizuki has come from Edo to keep Horisoto secure.

An opportune salaryman moves his family into a model mansion for 12 months; unfortunately, they must allow prospective buyers to trek through their home during business hours.

The president of the Japanese National Railways is found dead during a period in which train service is plagued by numerous layoffs, strikes and shutdowns. The government says that the president was murdered; the police claim it was a suicide. A quizzical reporter follows the case for years, but the basic question remains unanswered: was the victim killed by members of the burgeoning Communist movement in Japan, or was the death stage-managed by the authorities in hopes of discrediting the Communists?

Mori Kojiro, a member of the Akō Ronin, fails to identify Kira Kozukenosuke before their attack and is publicly banished by Ōishi Kuranosuke. Ōishi later apologizes privately, revealing that Kira has a decoy and assigning Mori a secret mission to kill the real Kira if necessary. Devastated, Mori finds solace with Okame, a local bar owner. After the ronin avenge their master, Mori, believing their mission complete, plans to leave his samurai life for Okame. However, Terazaka Kichiemon reveals that Kira was not killed but fled, and the decapitated man was a decoy. Mori decides to complete his mission and hunt down the real Kira.