Ken Ota is a Japanese-American GI. He comes to Hiroshima after WW2 looking for his big sister, but finds Keiko, a bomb victim with a keloid scar on her shoulder.

The sixth "Japan's No. 1 Man" feature. Followed by "Japan’s No. 1 Disconnected Man".

Mid 50s: the trials and tribulations of Shinsuke Ibuki, freshly arrived in Tokyo from Kyushu.

Mainly the story of Shinsuke and his stepmother, ranging from Shinsuke's infanthood to his mid-teens. Coal workers and the mines dominate nearly every aspect of the life of the characters. Shinsuke's father dies while bravely using dynamite to rescue a group of trapped Korean miners. Several older men attempt to help he and his mother cope, including a kind Korean and a Harley-riding yakuza.

In 1929 the fossil of a 500,000 year old man is discovered in China. In 1941 the Japanese army confiscates this find, but during the war the remains disappear. Based on these factual events, this movie takes off with a science fiction story involving a space rocket which places a satellite in orbit containing a secret cargo. The satellite crashes on a remote island and footprints are found in the sand leading away from the crash site. A story of how an ancient primitive cave-dwelling family contends with the scientists who want to study them.