East Prussia, Germany, 1945. War is raging across Europe, and as Russian soldiers close in across eastern Germany, Bruno and his mother must flee if they hope to survive. In the chaos of the attack, Bruno finds himself face to face with a huge black dog. He knows what she is: a weapon, strapped with explosives by the Russian army and sent into battle as an oblivious suicide bomber. But as Bruno’s world begins to crumble around him, he soon realises that she is just as scared and alone as he is. Faced with a perilous journey across war-torn Germany, will their bond be enough to keep them both alive?