A mermaid appears off an English seaside resort and inserts herself into the lives of holidaying families, drawing particular attention from two young women and their suitors. Her presence unsettles local manners and expectations, tests a pending engagement, and prompts debates about humanity, longing, and belonging. The narrative mixes light fantasy with wry social observation, moving between vivid seaside scenes and reflective commentary on desire, identity, and the limits of conventional society.