Terrifying psychological chiller featuring clinical psychologist Tony Hill of The Mermaids Singing and The Wire in the Blood. A twisted killer targeting psychologists has left a grisly trail across Europe. Dr Tony Hill, expert at mapping the minds of murderers, is reluctant to get involved. But then the next victim is much closer to home! Meanwhile, his former partner, DCI Carol Jordan, is working undercover in Berlin, on a dangerous operation to trap a millionaire traffiker. When the game turns nasty, Tony is the only person she can call on for help. Confronting a cruelty that has its roots in Nazi atrocities, Tony and Carol are thrown together in a world of violence and corruption, where they have no one to trust but each other.