The film dialog infers that these two woman associated by the horror of the Plaszow Nazi concentration camp in Poland, one as the daughter of the commandant, the other as the commandant's victim, came together through their own offices. But, even if the filmmaker pushed a bit to make this fateful meeting happen, the information made possible by the encounter is worth having. The presentation lets the women tell, or perhaps, "make" a simple, common story; it documents experience.
The deep rage born of history that caught these two women in its brutish logic is the compost from which the present sprang, so, whenever I get the feeling the passage of time has made this receding experience of being at the 'heart of darkness' understandable, I disturb myself awake by watching from my skull's open windows very believable witnesses such as these two marked but undaunted women who tell me with their eyes to not push archival understudying too fast toward the out of sight out of mind.
The Amon Goeths of this world are ordinary creations of time, not compelling monsters; they are born of ordinary cravings to be admired and loved-- Faust too was offered a chance to bargain away his value to himself as a moral instrument, and who wouldn't be tempted by an offer of worldly election and a game-changing chance to march to the music of passionate intensity (see Yeats), or a luminous future waiting at a Red Square parade, or at the designated public place for burning witches in New Jerusalem.