Summary:This film, the third in the Security Education series, is the story of an RAF Senior NCO stationed in Germany, who is being pressurised into passing information to a hostile intelligence service. The film explores a wide range of possibilities, each based on real-life case histories, with the NCO having access to some highly sensitive information as part of his work and being able, by lax security practice in others, to obtain some very delicate material to pass to the HIS.