On the Northern Continent there's a city called McCulley. If you head west of there, if you have Whale King or don't run into zoids, after a while you'll keep going and come back to McCulley, you ...

In the 21st century planet Earth was rendered inhospitable to life, and people mass-migrated to Planet Zi, the natural home of metallic life forms known as Zoids. Many years later, Zi faces its end.