The tiny "Ervuol Island", once held by the ancient and long-lost Ervuolian Empire, lies deep in the turbulent Sea of Dreams far from other land and is dominated by a single structure, a grand palace and museum that housed many of the most prized possessions of Ervuol's rulers.

The precise location of the island and its trove of treasures has long been a mystery, and historians widely believed that the island had sunk into the waters; however, scattered evidence suggests the island may still exist, hidden in the heart of the stormy sea.