The is movie about two strangers who have been left behind by the most significant person in their lives, and about how this bonds them as they engage in a bold project to sail from New Orleans to the Azores on a homemade raft.
Much of the wisdom is communicated by the voice-over commentary of 16 year-old Millie (Maisie Williams) who sounds like a deep south version of Christina Ricci's character in "The Opposite of Sex". The film is a little clumsy and Millie's accent is unnecessarily over-the-top but it is a good message and an overall pleasing effort.
Most profound is Millie's ambiguous statement about people dying when nobody is looking and living while nobody is watching. By which she is expounding on both their bold but by design unobserved rafting effort and on the human condition where many lives are lived without making a ripple in the fabric of society. And perhaps a third meaning, that the cool kids are so caught up in their clique that they have defined and made a cursory dismissal of everyone, blissfully unaware that awesome things are happening all around them.
There is a particularly interesting image early in the film, a shopping cart tipped over at the water's edge with a helium balloon trapped inside the inverted basket. Again this has lots of meanings, free spirit Penny trapped in the twisted metal of her wrecked car and unable to soar, Henry trapped by his grief, and Millie trapped by her defenses and unable to connect with anyone.
Then again, what do I know? I'm only a child.