A government official was killed in Saigon, South Vietnam, and Akimoto, a Japanese trading company employee who had been in contact with the government, had disappeared at the Haneda Airport. Jiro Kitami was dispatched to Japan from the International Secret Police Headquarters (I.S.P.) in Paris, to invetigate a German-American merchant named Rudolf Kent, who was involved in the incident. Kitami, along with Akimoto's colleague Ezaki, office secretary Mie Tsugawa, and fashion model Saeko Kinomiya, to stands up to break through the Kent Gang fiendish traps and stop them from using the code book where they selling weapons to the Viet Congs.