In Poland in the 1940s, the lives of twins Chaim and Gittel feel like a fairy tale torn apart as they must rely on each other to endure life in a ghetto and the horrors of a concentration camp where they lose everything but each other.

It's 1944 when the twin sisters arrive at Auschwitz with their mother and grandfather. In their benighted new world, Pearl and Stasha Zagorski take refuge in their identical natures, comforting themselves with the private language and shared games of their childhood. As part of the experimental population of twins known as Mengele's Zoo, the girls experience privileges and horrors unknown to others, and they find themselves changed, stripped of the...