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…

Single mother Qiao-Hui tries to understand her gay son Jia-Hao by downloading a gay dating app in a whimsical attempt. She disguises herself as a handsome colleague to get closer and chat with him, putting in great effort to uncover the truth behind her son's sudden change in behavior.