A spontaneous romance blooms between Kawamura, a professor touring Europe, and Naoko, a married woman living in Paris, scarred by the Nagasaki atomic bombings. The two protagonists travel around Europe trying to find themselves.
Two interwoven stories. The first is a biography of anarchist Sakae Osugi which follows his relationship with three women in the 1920s. The second centers around two 1960s' students researching Osugi's theories.
An engineer's wife returns home with a lost teenager. A man posing as her dad tries to get her back, causing the engineer to recall his youth as a revolutionary, obscured by dreamlike disruptions of time and space, fantasy and reality.