Also known as Suisei no Gargantia, we finally have more details on this new anime that will premiere on April. So far it looks very promising.
The story begins in the distant future in the far reaches of the galaxy. The Human Galactic Alliance has been constantly fighting for its survival against a grotesque race of beings. During an intense battle, the young lieutenant Red (played by Kaito Ishikawa) and his humanoid mobile weapon Chamber are swallowed up into a distortion of time and space.
Waking from his artificially induced hybernation, Red realizes that he has arrived on Earth, the long forgotten planet. On this planet that was completely flooded by the seas, people live in fleets of giant ships, salvaging relics from the seas' depths in order to survive.
Red arrives on one of the city fleets called Gargantia. With no knowledge of the planet's history or culture, he is forced to live alongside Amy (Hisako Kanemoto), a 15-year-old girl who serves as a messenger aboard the Gargantia fleet. To Red, who has lived a life where he knows nothing but fighting, these days of peace continue to surprise him.