The Good German Girl (A League of Extraordinary Women)

Omaha Beach
June 6, 1944 When battle-hardened Private Bernie Russell witnesses a fellow soldier shoot a young German boy with his hands up, he's shaken to his very core. Then, as that same boy is dying, he presses a packet of photographs and letters into Bernie's hand and utters three words in English.
"It must end."
After having the letters translated, he discovers they were written by the soldier's twin sister, and the photographs within the packet reveal evidence of Hitler's plan to wipe out the Jews.
Berlin, Germany Margot Raskopf is a young art teacher, forced to conform to the education Hitler has designed. Then, when one of her sources with the underground resistance receives a letter for her from an American soldier, she's shocked and filled with renewed hope. But Margot has been harboring a secret. In her house, she hides a young Jewish woman she's known since childhood, risking being discovered by the gestapo with each passing day.
As they begin a dangerous correspondence, both Margot and Bernie embark on treacherous journeys. One taking Bernie across Europe and right into Germany. Another taking Margot through the gates of Auschwitz ... and under the scrutiny of Josef Mengele.