A year after her father's death, Lisa wanders down to the rocky shore to plant a shrine in her father's honour. Down there, in the water, she meets Jack, an Irish boy she's quite unfamiliar with. As the two grow closer, Lisa discovers a secret about Jack she's unsure about: he's a merman. Lisa thought that mer-people were a fact of fiction, but after getting to know Jack a little more, she soon realises how much fun it is to sport a glittery tail in the water. If only her life on shore was as fun...