In 1959 Zofia Posmysz, a Polish writer who survived Auschwitz, was walking in the Place de la Concorde when she heard a German tourist calling out in a terrifyingly familiar voice. For a moment, she thought she was about to have an unwanted reunion with one of Auschwitz’s female guards. Posmysz proceeded to write a radio play called “Passenger in Cabin 45,” which describes such an incident from the opposite perspective.