Fiction based on fact, this a story of the search by the Germans and British to establish how far the other has reached in the development of a jet-engined fighter plane prior to WW2. In UK, the Germans use a dissident South-African-born engineer who lost both parents in the Boer War and harbours a resentment against the British government. Dogged police work eventually exposes him. In Germany, the British lose their experienced agent and are forced...