Serena From, the beautiful daughter of an Anglican priest, in her final year at Cambridge began a romance with a man older than she was—and discovered that she had been drawn into espionage. It is 1972. Britain on the brink of economic catastrophe is torn apart by industrial unrest and terrorism. The Cold War has entered its final phase, but the battle continues—especially in the realm of culture. Serena, an avid reader of novels, is sent on a covert operation code-named "Sweet Tooth," which will transfer her into the literary world of Tom Healy, a promising young writer. At first she likes his stories, and then she falls in love with him—and with him. Will she be able to keep her secret life hidden? And who invented whom? To answer these questions, Serena must refuse the first spy rule: "Don’t trust anyone."