Industrial espionage gets in the way of love and marriage for factory worker Katayanagi.

In the Tosa in the early Showa era, the fourth series of Tempo active series that depicts the activity of the woman trainer involved in the conflict of two pairs of confrontation yakuza.

At a restaurant called Anrakutei on an island is a wasteland surrounded by moat and swamp. The owner Ikuzo manages the restaurant with his daughter. It’s customers who have a dark past have utmost respect for Ikuzo. One day, a half-dead man Tomijiro comes to the restaurant. This is the beginning of Ikuzo’s terrible fight.

The 21-year-old feudal on Sendai, Tsunamune Date, was prohibited to go out in the daytime for his misbehavior during his short stay in Edo. On the next day, his 4 attendants were killed one after another. Sakai Utanokamike, the Rozyu, is turned out to be involved in this scheme, and the aim is to destroy the Date family. Tsunamune's brother Munekatsu Date who is willing to take over the family doesn't know the real purpose of Utanokami and helps him. Munesuku Harada gets to know the whole picture of the incident and takes action alone for the sake of protecting the Date family, leaving his own family. His lonely fight continues for 10 years and he got in danger in Utanokamike's house, and...

The government in Edo era is suffering from a financial crisis. It hires "Kage" to provoke the collapse of small hans (prefectures). "Kagekari" are people who were hired by Daimyos (mayors of local governments) to resist kage. The young mayor of Suwa Takashiwa, Tadamaru was assaulted by a kage on his way to Edo. Zyubei and Gennnosuke, the Kagekaris, try to carry injured Tadamaru to Edo.

During Tenpo period, Bakuhu announced a law regulating expenditures in order to improve the financial situation. However, Doshin of a government office Itami Hanzo, called Kamisori Hanzo, challenged Bakuhu's oppressive way. Because of this, his father Magobei was told to kill himself by the Bakuhu and Hanzo himself was demoted. Five years later, Hanzo came back to the government office and implement a law regulating expenditures. He stands up for revenge Torii Kainokami who desires power as he likes.

Hamakichi, who used to be a detective is now a toy merchant. His former boss has a grudge against the Yakuza family, which leads to the murder of a policeman in Edo. This places Hamakichi between the rock and a hard place.

When the 'Lowly Ronin' helps an orphaned teenage girl avoid being turned into a prostitute, she then claims he is her father and they start a farm as father and daughter until fate steps in and he must draw his sword.

The last film in the series brings the tale to the doorstep of Pacific War, with the planning of the bombing of Pearl Harbor dominant in Nakano Spy School.

In the fourth film of series, Secret Assignment, Raizo again plays the Jiro Shiina. This time he's out to discover who is spying for the British in the Foreign Ministry, under the code name “Cat's Eye”.