Self (archive footage)
Spanish photographer Francesc Boix, imprisoned in the Mauthausen-Gusen concentration camp, works in the SS Photographic Service. Between 1943 and 1945, he hides, with the help of other prisoners, thousands of negatives, with the purpose of showing the freed world the atrocities committed by the Nazis, exhaustively documented. He will be a key witness during the Nuremberg Trials.
Himself (archive footage)
In 1939, just finished the Spanish Civil War, Spanish republican photographer Francesc Boix escapes from Spain; but is captured by the Nazis in 1940 and imprisoned in the Mauthausen concentration camp, in Austria, a year later. There, he works as a prisoner in the SS Photographic Service, hiding, between 1943 and 1945, around 20,000 negatives that later will be presented as evidence during several trials conducted against Nazi war criminals after World War II.