At the beginning of the story, the boy
looked sad, but the mermaid (his imagination) made him happy.
By the way, we probably watch this movie
from the boy’s viewpoint, and feel angry with the police.
But if this tragedy
happens in reality, what will we feel? I think that we surely accuse him as an
eccentric man from the police’s viewpoint. Though we say “Imagination is
important”, we live by rules and exclude people who don’t adapt the society.
So,
I think the message of this movie is “Imagination is essential for us because
it makes us happy. Do you really cherish it like the boy? Or say “It disturbs
the order” and accuse him like the police?”