Nest of spies

Under the hot, mid-July sun, two men meet secretly at the sacred rock of the Acropolis in Athens. One of the men is Stephen Fletcher, alias Stefan Fettos, a British spy, the other is Colonel Spencer, Director of British Intelligence for the Balkans. At the meeting Fletcher learns that certain diplomatic moves, initiated by the British Government to bring about a settlement of the dispute between Greece and Turkey, are in danger of being sabotaged.