A world at war. One Empire falls as another rises. George V is a vassal, the British government has fled, and Zeppelins rain fire on London. As the might of the Reich sweeps through southern England, ordinary men and women have a choice to make.

Before fleeing north, Churchill's final act is to gather the men of London with a violent past and direct them to the vast network of tunnels beneath the city. When the call comes, who will rise up with the resistance and who will fall in line with the new regime?

Olga and Rudi are finally reunited, but nothing is as she had imagined. They must escape a war-torn Berlin before the iron curtain comes crashing down. In a land where identity is everything, where is safe for two German children and an English girl who was never born?