Schoolboy time-traveller Jack Christie is thrown back to 1940s Nazi-occupied France. With the Battle of Britain and the German Vengeance programme underway, the Second World War is at a crucial point. Jack and his best friend Angus take a more senior role in VIGIL's attempts to prevent intervention in history, attempting to stop the Revisionists from their highly volatile nuclear plan to stop the war. With spitfire dogfights, jeep races and thrilling chases, the boys have their most hair-raising adventure yet, including involvement in an assassination attempt on Hitler himself. Just as all seems lost, Jack's father returns and a nuclear disaster is averted in the nick of time.