Has a bomb ridden street in Europe with a boy

A war is raging, nowadays. A boy loses his home in an air raid. Disoriented, he is now fleeing with his bike as his only possession through an increasingly disrupted world.

1944. A band of runaways and orphans of the war scour the countryside in search of food and shelter. They invade and then taken in by a musician and former concert pianist who’s hiding out in a ruined castle. After the initial altercation between them the gang accepts his guidance and he wins their respect by protecting them from the elements.