On a luxurious cruise, Liza notices a woman whose face shakes her to the core and brings back memories. During World War II, Liza was a guard in the Auschwitz-Birkenau concentration camp. She chose Marta, a proud and defiant Pole, as a helper. Irritated by the prisoner’s attitude, she decided to do whatever it takes to break her into a perfect slave. For years, Liza was certain that Marta, the only witness to her crimes, died in Auschwitz. Now she sees her victim in an unknown passenger.