The murder of the chief official of Kobe city's Customs triggers an investigation of a prostitution ring called the 'Yellow Line' that sells Japanese women. A hired assassin is betrayed by his organization, and kidnaps a woman who happens to be the girlfriend of a newspaper reporter.

• Shintoho Company
• Shigeru Amachi
• Yōko Mihara
• Teruo Yoshida
• Yōichi Numata
• Torahiko Nakamura
• Jun Ōtomo
• Ryūji Oki
• Baku Mizuhara