A clinically efficient killer is murdering psychologists on the Continent.
The victims are scattered around different countries, complicating any investigation, but detectives agree on two things - a single killer is at work and a professional should be brought in to profile the murderer.
Psychological profiler Dr Tony Hill no longer wants to delve into the minds of serial killers - his wounds are still raw from his brutal encounter with Jacko Vance. But the European case is about to get personal: an old colleague of his is targeted by the murderer and Tony is unable to remain uninvolved.
Detective Chief inspector Carol Jordan is an route to Berlin too, on a covert operation to incriminate a millionaire traffiker in drugs and human beings. An already perilous job is made more dangerous when it appears Carol's own masters are playing a deeper, nastier game than the one for which she was prepared.
To trap their monsters, Tony Hill and Carol Jordan have to explore a past of Nazi atrocities and Stasi abuses, and a present-day world where cruelty is just a widespread but wears a different face