The Man Who Saw Too Much tells the story of 107-year-old Boris Pahor, the oldest living survivor of the Nazi death camps. He talks about his fight against fascism and his time, as a prisoner of the Nazis. He tells his story in his own words and through extracts from his extraordinary book Necropolis. The film is set in Natzweiler which although a relatively small camp was one of the deadliest - of the 52,000 prisoners who passed through its gates nearly half died. It is located in the mountains of Alsace and was the first concentration camp to be discovered by the western Allies.