First film in Teruo Ishii's Line series.

Director Teruo Ishii's crime action follows the investigative adventures of an undercover cop working with a prostitution ring. It's done in an unique documentary style.

It tells the story of a couple who fall into a trap set up by a sinister organization. One of them is a guy who is framed for the murder of his lover. The other is a woman pick-pocket who is entrapped by the organization's schemes involving their crimes. Fate places them together, and they start to investigate the prostitution ring run by the organization...

Freelance reporter “Scoop” Machida is hot on the trail of a prostitution ring called the Black Line, when he is framed for the murder of a young woman. Forced to clear his own name, the handsome journalist sinks deeper into the Black Line’s rotten swamp of drugs, prostitution, and murder and finds unexpected help in Maya, a steamy female gambler familiar with the neon-lit streets, shadowy alleyways, and seedy nightclubs he must navigate. The closest film in the Line series to classic American film noir, Ishii’s Black Line is a pulpy assortment of crime film conventions including the starkly expressionistic black and white cinematography by Jûgyô Yoshida, a jazzy music score by Michiaki Watanabe, and a sleazy screenplay by Ishii and Ichirô Miyagawa.

Rika, a manageress of a night club is about to be arrested on suspicion of smuggling. However, she escapes through the assistance rendered her by First Lieutenant Yokoyama of the Japanese Naval Commander's Office. After the end of war, Yokoyama plans to escape from riot-ridden Amoy and finally succeeds with the help of Rika to whom he gives a destroyer. Rika is actually the leader of a gang of pirates, and plans to rule the East China Sea by crushing Banryu, her rival.

Japanese crime film

This time around, Sashichi is investigating a case of serial murders believed to be perpetrated by a giant bear.