Barely half of the Bomber CommandÃ¢Â€Â™s aircrews survive a full tour, but wireless operator Billy Angell has beaten the odds and completed his thirtiethÃ¢Â€Â”and finalÃ¢Â€Â”mission. Now, Billy is due two-weeksÃ¢Â€Â™ leave, a posting to a training squadron and a six-month exemption from active duty.
Except that MI5 need an airman to drop into Nazi-occupied France.
MI5 are interested in HÃƒÂ©lÃƒÂ¨ne Lafosse, a Frenchwoman keeping unusual company in her small family chÃƒÂ¢teau in the depths of the Touraine. HÃƒÂ©lÃƒÂ¨ne has begun an affair with a senior Abwehr intelligence officer, who, in return, has turned a blind eye to the succession of Jews, refugees, resistance fighters and downed Allied airmen to whom she offers shelter. MI5 believe they can exploit this relationship and plant a false lead about the anticipated allied invasion of northern France.