During a summer by the sea, Xiao Wu is rescued by Shuo, a lifeguard who mistakenly thought he was drowning. This encounter stirs up long-restrained desires in Xiao Wu’s heart as he finds himself unable to take his eyes off Shou.

On Green Island in the 1950s, the female thought prisoners chose to fight for freedom, but were more forcefully suppressed by the authority. They held on to their beliefs and hoping for true freedom to come.

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…