Trapped in a strange void, Nadia comes into contact with a mysterious voice who tells her that she is actually aboard Red Noah, a satellite city that descended to the depths of the ocean 2,400,000 years ago. Communicating with the mysterious identity, Nadia learns that she is, in fact, an heir to the throne of the Atlantis… and that she is not a human being. Furthermore, her real birthplace turns out to be Old Tartessos, the ancient kingdom Atlantis that was destroyed thirteen years ago. After learning about the history of her people, Nadia is told that she will be taken to the underwater kingdom of Atlantis to "guide the lost souls toward its restoration." The island begins to collapse and crumble, and the companions are forced to flee. But Jean stays behind and bravely returns to the same place where Nadia disappeared moments earlier, calling her name. Nadia realizes that Jean is more important to her than the Blue Water and is forced to admit it to the mysterious voice. Nadia is released, but warned that she cannot escape from her destiny, which is to rule over Atlantis, or use the power of the Blue Water to become a "god" or "devil." Nadia is overjoyed to see Jean and tearfully embraces him. The pair flee the cave and are almost swallowed up by the sinking island, but the Gratan comes to their rescue. Reunited, the companions watch as the island disappears into the ocean for good.