It follows the story of a young boy and his father. After an unnamed event brings human civilization to a hault. The pursuit of survival is all that remains. This isn't an action movie at all. No explosions no Bruce Willis one liners.
It's a story of a father and son surviving not just via locating food, but also maintaining their humanity. It's filled with a lot of details that in any other movie you wouldn't see or take any notice of. Such as a father giving his son a can of coka-cola which since the son was born after the events has no clue what it is or how to drink from it.
It's a well done portrayl of not just the end of the world scenario but of a loving relationship that literally endures the hardest things life has to offer. It's a sobering experience to watch it, and I have plans to make time for the novel.
If you ended up like me and didn't make time for this gem earlier. It's out on Blu-ray DVD and netflix. There's no real reason to skip it. You won't regret it that's for sure.
My only caveat is that it's a bit hard to take as there is violence, if you're really sensitive you might want to see an edited version. Though it's no worse than what's out there.