It is 1940 and First World War veteran John Groves awaits news of the impending invasion of London by the military might of Nazi Germany. His priority, to protect his family. Later, sabotage is planned by John to fight back, but when a high-ranking German general visits John's family home, the meeting leads to dramatic and unimaginable events for him and his family. An enduring, unlikely friendship develops between the two men and their families as the drama unfolds amidst the intrigue of an occupied nation, where they must act ruthlessly for survival.