Year 4981. Humans became extinct years ago due to the consequences of their own progress. In the society of the future, both species that became intelligent over time and species created by humans themselves lived in peace.
This peace was maintained for centuries, until, one fine day, the Enedusi, one of the species created by humans, rebelled against everything and everyone, creating the New World revolutionary movement. Since that day the world is at war, and the main enemies of New World are the allies of Resistance, led by the geese.
It is during that war that the geese create a weapon of mass destruction to see if, with it, they could defeat the Enedusi once and for all. That weapon is our beloved Gunso, the protagonist of the adventure.