Serafina, Harmony, Lydia, Avon, Astrid, and Ivory. Six mermaids scattered across from different seas, were lured across by Sirens. They discovered the truth about their hidden identities. The six mermaids were all decendants of the Six Apprentices, and told by legend, were meant to rule the powerful Empire of Lunes. The empire fell when warriors from other seas attacked. They learn again that the ancient attack that had fell on the empire, is coming again. the six mermaids head out to warn their families, but they dont give in. The six mermaids then head out to find their idetntities, in which one apprentice left for each mermaid. They face danger, and other tragedies. The tale of these decendants all combine into the Abyss.