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 1934 Diego Padilla wins the Spanish Championship of Chess and meets a French journalist, Marianne Latour, and they fall in love. At the end of the Civil War, Marianne convinces Diego to live in France with their daughter, where shortly afterwards Diego will be accused of spying by the Nazis and imprisoned in an SS prison. In prison, Diego will try to survive in a hostile environment thanks to Colonel Maier's passion for chess.

English-language adaptation of Albert Cohen's epic Swiss tale of a tortured love affair between a high-ranking Jewish official and the protestant wife of one of his employees.