No spoilers here, except that might be in any review you might read.
Josh Brolin plays a tough-minded oldish man who stumbles across a drug deal gone wrong, way out in the empty prairie. Everyone is dead, so he legs it with two million dollars in a suitcase (this was 1980 so £2m is a lot). Javier Bardem is sent to hunt him down, as part of some background plot that is never explained to us.
Now this builds in a series of gripping and intelligent gladiatorial sequences, very reminiscent of the Coens' best. Until about two thirds or maybe three quarters of the way through where it all falls apart. I can't say more without spoiling the story. I can't deny I was disappointed that it didn't snap shut like Blood Simple or Fargo. Having said that it bit at some level, because it left a trace inside me, which came out in these dreams, but bypassed conscious understanding.