A long time has passed since the evil king of the deep sea was sealed at the bottom of the frozen ocean. The seven kingdoms in Dylan's world have entered a long period of stability. However, an ocean-going expedition fleet secretly entered the mysterious waters of the East and brought back an ancient book - the Book of the Ocean. According to the ancient royal secret book, this book was written by the gods in the ancient continent and records the ultimate secrets about the world. Three thousand years have passed, and the servant of the Deep Sea King, the King's Attendant, has returned again, bringing chaos and the terrifying shadow of the Deep Sea King's reappearance. For a time, the storm in the Seven Seas rose again, and a war for hegemony in troubled times quietly began.
