Ensign Ledo, a pilot for the Galactic Alliance of Humankind, is injured during battle and awakens on a planet populated by a primitive tribe of humans.

Ledo learns the truth about Earth's current state just as a distress call comes from Bellow's salvage ship.

Ledo is viewed as a threat and kept under guard, while Empress Lukkage's pirate fleet races toward the Gargantia Fleet for revenge.

Chamber is put to work hauling heavy cargo to pay for damaging the hangar, while Amy introduces Ledo to the knowledgable Dr Oldham.

After failing to find a job, Ledo is invited to a party where he finds himself trying to escape overzealous hostesses.

Gargantia enters a Milky Way, and Ledo has a chance to catch fish underwater in a Yunboro but is unprepared for the job.