Waves
What would you do if you knew something was not part of you but it is something that pulls you near that block?
The teenage life that they call it fun, happy, and cool, turns out to be unrealistic for some. And some of those people would question themselves if they are in the right place or at the right time to be born. No matter how much grief and remorse we have within us, we will eventually find a way as to why it happened, why it wasn't noticed by you.
That's what the film may be trying to call out to those right people.