Please, I need a very short summary of The Silver Sword.

The Silver Sword realistically presents the problems of war as seen through the eyes of a Polish family torn apart by World War II. The novel's main characters include three children—Ruth, Edek, and Bronia Balicki—who are left to live as best they can in the streets of Warsaw when their father is sent to a prison camp and their mother is taken away to do forced labor in Germany.