父親出海後的失蹤像謎團，相依為命的母子各有煩惱，在班級中被側目的小男孩在漁村裡四處捕撈水黽，母親獨自承受著三姑六婆的討論還有走或留的掙扎，長鏡頭下的海邊風景其實有深沉的抑鬱。

Khun-sin is like a solitary island, and those who are struggling in water.

Faced with the missing husband who set sail to the seas, Yue’s life is just like swept by the current as well, whereas her little Ren is looking for the water striders. What he wonders is why they can live safely in water without sinking.