A young businessman wakes up in a hotel room, locked from the inside, along with his lover, who was murdered while he was unconscious. He hires a prestigious lawyer, and over the course of one evening, they must work together to build a defense case for him before he is taken to jail.
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.