In 1946, Rudolf Franz Ferdinand Höss, the longest serving commander of Auschwitz concentration camp, is awaiting trial in a Polish prison. Albert, a young and successful Polish investigation judge, is appointed to interrogate Höss and get a perfect confession out of him. The encounter between the two men will unveil the frightening routine and banalization of evil that took place in the camp.

By introducing the use of Zyklon B in Auschwitz, Rudolf Höss carried out the most efficient mass killing process ever known, which claimed the lives of approximately 1.1 million people. The film is based on the memoirs Höss wrote before his execution.