The real-life story of one working wife and mother who became a hero to hundreds during World War II. In 1939 Poland, Antonina Żabińska and her husband, Dr. Jan Żabiński, have the Warsaw Zoo flourishing under his stewardship and her care. When their country is invaded by the Germans, Jan and Antonina are stunned – and forced to report to the Reich's newly appointed chief zoologist, Lutz Heck. To fight back on their own terms, Antonina and Jan covertly begin working with the Resistance – and put into action plans to save lives out of what has become the Warsaw Ghetto, with Antonina putting herself and even her children at great risk.