Martha is a barmaid and lives in Weymouth, England, but she isn’t just an ordinary barmaid – she is a mermaid too! Ever since she was just a young girl, Martha has always felt different to everyone else. When more green scales start developing on her legs, Martha knows that the time has come for her to finally live as a “proper mermaid” in the sea of Weymouth beach. The question is, will she actually like it under there? And what will happen when she gets lost and accidently ends up in Malibu?