Historical drama about two samurai who fight over everything yet unite together to fight an evil lord.

In 1842, in the Umemoku Mansion within Hikone Castle, Naosuke Ii, despite the tumultuous times, was engrossed in the world of tea ceremony. His friend, the Kokugaku scholar Nagano Shuzen, introduced him to a captivating shamisen master named Murayama Taka. Naosuke became deeply infatuated with her, disregarding the jealousy of his consort Shizu and the warnings of his senior retainer, Gaiji. However, upon discovering Taka's relationship with Shuzen, Naosuke promptly ended his ties with her.

On March 11 in the seventh year of Tenpo (1836), a monk named Bennō, who fell in love with a geisha named Oshima, was publicly exposed at Nihonbashi for committing an illicit act with a woman. While this was happening, an extravagant procession led by another monk named Nikkei passed over the bridge. Nikkei, the head of the Kanouin temple, in collusion with Nakano Harima-no-Kami, had schemed to make his younger sister, Miyoshi, the Shogun's mistress and aimed to transform Kanouin into the Shogun's family temple. To fund the renovations, Nikkei accepted bribes from a corrupt merchant named Koya Bunzo.

During the era of Tokugawa Ieyasu, one night a carver named Fujijiro was murdered. Immediately launching an investigation, Denhichi, accompanied by Otoshi and Take, toured the entertainment houses of Ryogoku. There, they discovered a connection between an acrobat and the incident. On their way home, Otoshi unexpectedly encountered an old friend, Inosuke, nervously buying a dagger. Inosuke, a clerk at the Kashimaya store, was in love with Oko, a secret lover of Bunzaemon. Amidst this, Seihei, the head clerk, was murdered by someone, and a dagger belonging to Inosuke was found at the scene, leading Gohei to suspect Inosuke as the culprit. However, Otoshi was hiding Inosuke. Driven by Otoshi's plea and a professional instinct that Inosuke wasn't the perpetrator, Denhichi desperately searched for the real culprit.

Hearing that his friend Yosuke Tsumura had died, Shiro Okabe returned to Kyoto. He felt that Yusuke's wife, Yusuke Tsumura's former love Yuko, knew something about Yosuke's death, but he was unable to find out what she knew. Okabe investigates Yosuke's death, but someone kills the people who provide clues one after another. Okabe follows Rumi, a woman at a bar who was close to Yosuke, to Mt. Hiei, and to his surprise learns that Yosuke is still alive.

In the mid-Tokugawa period, a conflict arose over the "Seiryū Himon," a secret document left by the former shogun Iesai, bequeathing the eighth shogunate to young Lord Manguro of Owari domain. This document became the center of a struggle between the current shogun, Yoshimune, and Manguro. Iida Daisuke, a member of the shogunate's secret intelligence group, the Kurokuwa Group, stole the document from Owari but was killed by Manguro's men. The document then fell into the hands of Yozakura Ogin, who had pledged her life to Daisuke.

Second movie in the Sakura Code series.

Red Castle Lullaby by Taizō Fuyushima

1960 movie directed by Taizō Fuyushima