Hao, a girl who lives with her family in a boathouse on the coast, is a low-income worker in a sewing factory. Her family dreams of earning money and getting a small apartment on the mainland. Hao dedicates her life to her family, hoping her younger brother will graduate from college and become a white-collar worker. One day, during an interview for a part-time job at a mermaid show at an old aquarium, Hao demonstrates the ability to hold her breath underwater for an amazingly long period. Gradually, in the water, she feels a strong will to live. A semi-mythical Proletariat fantasy film that weaves the imagination of anthropology and genetics into the labor and housing problems of people experiencing poverty in Hong Kong. [SONG Hyojoung]