Hsu Zi Qi is a young woman who lives alone in the city. Lee is the autistic son of Zi Qi's landlady, who tries to free himself from his protective mother. Feng is a shy young builder, who struggles with the constant breakdowns of his car.

The story unfolds with an allegorical inspiration from the well-known fairy tale, The Little Mermaid, in which the mermaid princess falls in love with the prince it saves from drowning, with a surprising twist of the mermaid being a young boy…