The story takes place in the heaven, which corresponds to the mortal world. The dark sky in the sky at night is the sea of heaven, and the stars in the sky are the eternally shining palaces (i. E. Islands) floating on the sea of heaven. A palace on the sea of heaven is an island. In the heaven there is only the endless ocean and the palaces floating on the ocean. In the world of heaven, there is no exchange of money for profit, only terrible prophecies...