You could watch it thinking just another teenage drama all doomed with tragedy but wait till the end. It's not till the end the true goal is achieved and true characters are revealed. Truth is, this is story with obvious outcome but what makes it different is the characters and how they reach to reality of situation. The scene cut abruptly and goes back and forth from sad to jumpy to anger to romance and back to being sad. Even the mysterious reveal is so subtle that many of us won't notice. But it's all with good intentions that movie is wrapped up by the waves crashing beach which metaphorically symbolises that you live multiple lives of your parents and your friends and you lose all those lives when you die.
