Far beneath the sea, where the water is as clear as crystal, the young mermaid lives with her father, the Mer-King, and her five older sisters. Unlike them, she is quiet and thoughtful, longing not just for the human world but for something even greater—
an immortal soul.
Each year, when her sisters turn fifteen, they rise to the surface to witness the world above. When her turn finally comes, she sees a grand ship where a handsome prince is celebrating his birthday. A sudden storm destroys the ship, and she rescues the unconscious prince, carrying him to shore. But before he awakens, a girl from a nearby temple finds him—he believes she was the one who saved him.
Heartbroken, the mermaid watches from the waves before returning to the sea.