Humanity long ago abandoned a ruined Earth but returned when it was capable of sustaining life again. Sky Pirates Fam and her best friend Giselle fly fearlessly in Sleek Vespa Vanships in the skies above to capture and sell airborne battleships for profit. This ends when the Ades Federation attacks. As the only nation remaining on Earth during humanity's exile, they now wage war against those who return. After rescuing a young princess from the rampaging Ades armada, Fam and Giselle join the battle to save her Kingdom from destruction and undertake a nearly impossible mission of uniting humanity in peace.