It is the post-World War II story, in which a Hungarian Jewish prisoner (Géza Röhrig) tries to do an ideal humanitarian mission. This imprisoned man is focusing the German Nazis and trying to find a rabbi to bury the body of a child, who saved him from the gas oven in a deadly moment.
Brutal and brilliant, "Son of Saul" may be the most harrowing film ever made about the Holocaust, which should give you an idea of how hard it is to watch.
It's a story of a man who fights for triumph in the worst of circumstances, a parable about how the slightest glimmer of light can give those engulfed by tragedy a renewed sense of life.