The story takes place in the near future on a space colony under construction. An action-adventure story of some boys in this peculiar environment and society who keep living their lives while they’re being tossed about by fate.

Mushi are beings in touch with the essence of life, far more basic and pure than normal living things. Most humans are incapable of perceiving Mushi and are oblivious to their existence, but there are a few who possess the ability to see and interact with Mushi. One such person is Ginko who travels from place to place to research Mushi and aid people suffering from problems caused by them.

A day in the life of a young boy living in a country that routinely fires large cannons at an unknown enemy.

Three back-to-back anime films by three different directors make up this sci-fi trilogy three years in the making.