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.

In 1945, at the end of World War II, Neus Català returns to France, where she recalls her life under the Nazi yoke.

The life story of Vicente Miguel Carceller (1890-1940), a Spanish editor committed to freedom who, through his weekly magazine La Traca, connected with the common people while maintaining a dangerous pulse with the powerful.

Rafa, a Communist Republican exiled after the Spanish Civil War, returns to his hometown to carry out an attack against the imposed tyrannical regime, but the mission fails and, in his attempt to escape, he kidnaps a lady of high society.

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.

The story of the Spanish Republicans of La Nueve, the 9th Company of the Régiment de marche du Tchad, part of the French 2nd Armored Division, known as Leclerc Division, whose troops were the first who entered Nazi-occupied Paris on August 24, 1944.