The Man Who Saw Too Much tells the story of 106-year-old Boris Pahor, believed to be the oldest known survivor of the Nazi concentration camps. He was sent to Dachau, Dora, Harzungen, Bergen-Belsen and Natzweiler – one of the Nazis' least known but most deadly camps. Twenty years after the war, Pahor wrote an extraordinary book about his experiences called Necropolis - City of the Dead. Pahor’s harrowing descriptions are illustrated with remarkable drawings by fellow prisoners, creating a unique record of conditions in the Nazi death camps. His testimony, along with details from a shocking report into the camp by British intelligence officer Captain Yurka Galitzine and the chilling testimony by SS commandant Josef Kramer, infamous as the Beast of Belsen, combine to tell an extraordinary story.

Produced and presented as evidence at the Nuremberg war crimes trial of Hermann Göring and twenty other Nazi leaders, this film consists primarily of dead and surviving prisoners and of facilities used to kill and torture during the World War II.