Ellie, a top singer, is reborn into the body of a girl who failed a Mermaid Augmentation Surgery in the interstellar era. The mermaid gene in her body was awakened, making her the only mermaid in the galaxy. Her singing has healing and purification abilities, helping people with disordered Psychic Power. She saves Marshal Soren, whose Psychic Power draws him closer to Ellie. The two work together, guard the peace, and live happily ever after.