April, 1945. In the wake of the Liberation, Paris feels very different to Frederick Rowlands's hazy memories of the city from the time of the Great War. His visit this time is at the behest of MI5 agent, Iris Barnes who is on the hunt for traitors. The key to finding them might be a young woman calling herself Clara Metzner, not long released from Ravensbrück concentration camp. Rowlands last met Clara in Berlin twelve years before, and now has the unenviable task of confirming her identity. Rowlands' blindness aside, Clara's experiences have changed her beyond recognition, but her evidence may be vital for tracking down suspected French collaborators. Then the trip is derailed by a shocking death, and circumstances that point to murder. Thrown into the unfamiliar world of Parisian high society, Rowlands must track down the killer, and prevent further deaths - including his own.