"The stifling summer streets of Lisbon are teeming with spies and informers when Andrea Aspinall, a brilliant English mathematician turned spy, disappears under a new identity. Double agent Karl Voss, experienced in the illusions of intrigue, arrives in Lisbon under the German Legation, though he is secretly plotting against the Nazis. In the lethal tranquility of a corrupted paradise, Andrea and Karl meet and embark on a brief, intense love affair."--back cover.