Gargantia on the Verdurous Planet - The Complete Series (English Dub)

Ensign Ledo is a Machine Caliber pilot in the Galactic Alliance of Humankind, fighting a seemingly endless war against the Hideauze out in the far reaches of the galaxy. But after an accident during the latest battle he and his Machine Caliber, Chamber end up on a mysterious planet populated with a seemingly primitive tribe of humans.

The armed standoff between Ledo and the inhabitants of Gargantia comes to a head, and he learns the truth about Earth's current state. But just then, a distress call comes from Bellows's salvage ship!

After Chamber wipes out all of the pirates that were threatening Bellows and her crew, Ledo is perceived as a menace and kept under guard by the crew of the Gargantia. Meanwhile, Empress Lukkage's pirate fleet is racing towards the Gargantia Fleet with bloody revenge in mind.

In order to pay back the damage to the hangar they caused, Chamber is put to work hauling heavy cargo, but that leaves Ledo on the sidelines on stand by. Amy takes him around the fleet and introduces Ledo to the knowledgeable Dr. Oldham as well as her sickly but wise younger brother, Bebel.

Amy tries to help Ledo find a job and introduces him to a number of different industries aboard Gargantia, but he's just not able to land one. Then the wind dies down and the waves cease, making it a "Calm Day," where the fleet shuts down so major repair work can be done. But for non-repairmen, it's time to take a breather. Pinion invites Ledo, Amy and her friends to a BBQ party. Everything seems to be going smoothly... until Amy gets involved in an aerial race and Ledo finds himself on the run from overzealous hostesses!

When Gargantia intersects with a Milky Way, it means there'll be a fishing bonanza, which also leads to a big festival. Ledo finally gets his chance to catch fish underwater in a Yunboro, but he's unprepared for the job. But during the festival, Pinion and Bellows, both of whom want to partner up with him for salvage work, approach Ledo. Meanwhile, Chamber is on a solo fishing mission of his own, but the giant Machine Caliber ends up causing even more trouble.

When Ledo has an encounter with a whalesquid undersea, he attacks and kills it because of its similarities to the Hideauze. Little does he know that whalesquid are considered sacred, and killing one is taboo. Soon the whole ship is in an uproar over it. Ledo, however, believes that whalesquid are Hideauze and he's determined to carry out his mission by slaughtering more of them before they decide to target humans on Earth. Just as Amy tries to stop Ledo, a huge pod of whalesquid approaches the fleet.

On his deathbed, Fleet Commander Fairlock entrusts Ridget with Gargantia. Meanwhile, Chamber finally gets a fix on the location of the Galactic Alliance, but they're so far away that Ledo will never be able to get home. As preparations are underway for Fairlock's funeral, Shipmaster Flange announces that he's leaving Gargantia. Ridget struggles to keep other Shipmasters from following suit. Pinion has plans of pillaging the ocean floor, so he joins the like-minded Flange. Amy is sad when she finds out two people she cares about, Melty and Ledo are leaving as well.

Ledo and Chamber go deep sea diving to exterminate Earth's Hideauze. After an intense battle, they discover a Hideauze nest at the bottom of the sea, and inside, ancient video footage showing the Earth's former civilization, the race to escape into space, and a secret that blows Ledo's mind!

Ledo is in a state of shock over the revelation of the Hideauze's origin, while Chamber is unperturbed and seeks to continue their mission to slaughter them. Meanwhile, power quickly goes to Pinion's head. After recovering an abundance of treasure and ancient weaponry from the whalesquid nest, he broadcasts a threat to all ships in the area. But that doesn't deter pirates from zeroing in on the small fleet.

Ledo is elated to learn that his commander, Kugel, is not only alive and well and on Earth, but leads an entire fleet. But the Kugel Fleet seeks to assimilate Flange's Fleet... with Pinion's help! Unaware of this, Ledo eagerly rejoins Kugel's command until he finds out that his former commander is just as much a terror to the people under him as he is to the Hideauze.

The horrors of Kugel's Fleet become even more apparent to Ledo, Pinion, and the others. Even worse, Kugel's next target for assimilation is Gargantia! Ledo is faced with a choice: loyalty to his commander and to the Alliance or to the friends on Gargantia he recently left in order to protect!

To save Gargantia, the outclassed Ledo and Chamber have to defeat Striker by any means possible. It seems the only choice is for Ledo to merge with Chamber to boost its power, but the process will kill him in a matter of minutes! Meanwhile, Ridget finally learns the purpose of the key... it unlocks the ancient weapon known as the Heaven's Ladder!