Ryan Reynolds is trapped in a coffin buried somewhere in Iraq.
They call this a suspense thriller with twists and turns, but that's a crock of shit. It's very straightforward. Nothing happens that will surprise you.
I wouldn't say the movie is anti-anything as it's more about the story being told, but you could get a sense that it is based on the situation and the dead ends Ryan hits.
Ryan does a good job acting, and if you ignore all the gaping holes in reality, it's an entertaining film.
Spoilers below...
I won't say how much of the film is spent in the coffin, but it's a lot. You're going to see a LOT of Ryan, and little to none of anyone else. No flashbacks or anything.