Rikiya Shoda is an engineer working for the Atomic Agency in Japan. One day, his wife Nanako returns home with a lost teenager called Ayu. A man, pretending to be the father, comes to get her back; Ayu keeps telling him that Rikiya and Nanako are her parents. Through this disruption, Rikiya suddenly starts remembering his youth as a revolutionary.
A car going at 25 mph plunges into the sea at Shinko Harbour, Toyama prefecture. Inside is the local business magnate Fukutaro Shirakawa, who perishes. Riding alongside him and surviving unhurt is his second wife, Kumako. It soon comes to light that Kumako’s husband was insured for 300 million yen and she is arrested on suspicion of murdering her husband for the insurance money. The newspapers denounce her as an evil woman, while the public is in no doubt about Kumako’s crime. Ritsuko Sahara is chosen as her defence attorney but the pair clash over almost everything...
UFOs appear on Earth, and people who actually see them suddenly find that their blood has turned blue. Soon panic and hysteria result in the new "blue-bloods" being persecuted by the rest of mankind, and eventually certain all-too-familiar measures begin to be taken against them.
