The Woman from Hamburg.

In 1943 Poland, Regina, a Jewish woman, has lost her entire family and is rescued by a young childless couple, Jan and Barbara and given shelter in their closet. Over time, Regina grows close with the couple, and Barbara and she are forced to make sacrifices to stay alive. Many years later, Helusia, a descendant of Regina's, embarks on a quest and makes a discovery that upends the lives of all involved.