"Coralline is a mermaid who is engaged to the merman of her dreams. But when an oil spill wreaks havoc on her idyllic village life, her little brother falls gravely ill. Desperate to save him, she embarks on aquest to find a legendary elixir made of starlight. Izar, a human man, is on the cusp of an invention that will enable him to mine the depths of the ocean. His discovery will soon make him the richest man on earth--while threatening merpeople...