Feef is midway through spy training and longs for adventure, but with the war coming to an end, she finds herself working behind a desk within the British civil service instead. Feef is then seduced by an American agent into spying on her own country.

Feef's lover goes missing, just as things begin to heat up in her hunt for the Russian mole. And she commits her first personal betrayal when she's instructed to spy on Hugh.

The truth about what happened to Jarvis is revealed. And the Soviet mole begins to notice Feef's mission. The game of cat and mouse is on, and the stakes are deadly.

Rowe tries to break into Rae's house in search of evidence. Frustrated with how isolated her double life has made her, Feef quits - right before discovering that Priscilla is hiding something.

Feef finds out what happened to her missing lover and who the mole is. She kills one enemy, but makes a deadlier one. Time is running out, her life is at risk and she doesn't have any allies left.

With no one left to protect her, Feef is forced into the mole's path when she is asked to try and 'turn' them, and escape a new and dangerous enemy. And Hugh gives her an ultimatum.