Shows problems between fathers and sons , specially when the father is absent. But the real message is that there is not life out there!!! That is the most important message. NO LIFE OUT THERE!!! Horrible , no? Because you don't need to go to Neptune to have a problem with an absent father, no?. To me, is a film with no sense!!! You don't need two hours just to tell us that there is no life!!! From my point of view, zero should be the grade for this movie. Have a good day!!!