Sisters. Traitors. Spies. When a British RAF Whitley plane comes under fire over the French coast and is forced to drop their cargo, a spy messenger pigeon finds its way into unlikely hands... The occupation has taken much from the Cotillard sisters, and as the Germans increase their forces in the seaside town of Boulogne-sur-Mer, Gabriella, Martine and Simone can't escape the feeling that the walls are closing in. Yet, just as they should be trying to stay under the radar, Martine's discovery o...