In the blue world, 99% of the area is covered by the "Sea of Mist", and the sea is dotted with countless "law islands" with different fantasy rules. Humanity established the last civilized alliance "Navy" on the giant ship "Ark". Pirates are plunderers and adventurers who explore the truth of the fog. Legend has it that by collecting the seven "Keys of Truth", you can open the "Island of Origin" at the end of the world and gain the power to rewrite the rules of the world.
