Eversea, or as it's scientifically known by humans, is Alpha Centauri AB d, the 4th planet orbiting both Alpha Centauri A and Alpha Centauri B.
It is mostly a water world except the desert continent, Unkyen, and the 3 Hawaii-sized islands, Vyspa and the Twins.
The main inhabitants are not native to this world, and most of the native civilizations are in hiding, waiting for their chance to get their revenge. Until then, the Sarna, the Caprini, the Valudzki, and the Ludovody fight amongst themselves for resources.
Our story begins when The Third Guardian crashes onto Eversea, further tipping the balance.