The stage is the earth in the future.
Humanity has given up earth's drastically degraded
global environment and emigrated to Mars. The
abandoned earth has been gradually occupied by
various new creatures. Three youths who long for the
good-old-earth, head for the salvation and re-discovery
of an ideal world on the earth again.
Starting from Africa, they proceed through Eurasia,
America and finally to Antarctica. There are 8 stages.
It is a long journey on a fighter aircraft...