At the beginning of 1960s, a Stalinist criminal - Julia Brystiger, nicknamed "Bloody Luna" because of her cruelty in torturing prisoners during interrogations - turns up at the Institute for the Blind near Warsaw, asking to meet the Primate of Poland, Cardinal Stefan Wyszynsk. His imprisonment in the years 1953-1956 was supervised by none other than Julia Brystiger herself. Their tempestuous conversation develops in a tense confrontation between faith, doubt and salvation.