After a lifetime of espionage and assassination on behalf of the British Government, Berkeley Townsend looks forward to a comfortable retirement, and to enjoy both his second marriage and the company of his daughter Anna, who he has rescued from the people who kidnapped her. But Berkeley's exploits have earned him the undying enmity of the Nazi Party in Germany, and they are dedicated to his destruction. When they come close to succeeding, it is the women in his life, his daughter Anna and his mistress Marita, who take up his defense and carry the fight into the very heart of the enemy stronghold.