In September 1943, 17-year-old Stanisław Zalewski was arrested in Warsaw as a member of a Polish resistance group and taken to the Auschwitz-Birkenau extermination camp for labour service. From there, he was sent to Mauthausen and finally to the Gusen camp, where the prisoners were forced to work for the German armaments industry under inhumane conditions. For a long time, Stanisław Zalewski, like many other victims of Nazi terror, remained silent about his painful experiences. It was only after forty years that he began to talk about it, at events, memorial services, and in schools, and he continues to do so to this day, even at the age of 99. Now, for the first time, he tells his stirring life story in a film as a deeply impressive ‘ambassador of remembrance’.