Racheal a British red-head 15yr disabled human girl, she doesn't have ability to walk, she only use wheelchair to go where ever she want, she always dream to be a mermaid, but she think it's only a useless dream, her grandpa always told her mermaids are not exist. her father Richard is a famous musician conductor in london, Racheal admired her father work, her father quotes that she always remember is "Just Follow the Rhythm".. when Racheal free, she go to a Marine Life Rescue Centre, to watch sealife , one of her friend is a KIKI girl (whale/seal/dolphin trainer) named Aira. she always and teach Racheal to interact with Aira's Seals. Racheal rarely have friend because she disabled. one night Racheal saw a bright fallen star, her wish to be a mermaid, will her wish come true?