A mother lies brutally murdered in her ransacked, two-bedroomed flat. Beside her are the bloodstained bodies of the two police officers who were first on the scene. In the bedroom are the victims two children, a six-year-old boy and a baby, slaughtered as they slept.</p> </p>And the killer is still in the flat.</p><strong> </strong></p>Paterson sets off in hot pursuit. But after a desperate rooftop chase, the killer escapes.</p> </p>The following day, another woman is found dead in her own home, her decapitated body carefully posed in her living room, her wrists pierced by crucifixes.</p> </p>Why were these women targeted?</p> </p>Paterson and Clocks have never had to deal with a killer like this. A killer who shows no mercy. A killer who cant be reasoned with. A killer who covers their tracks with super-human efficiency.</p> </p>If they are to get their man, the two detectives must break every rule in the book.</p> </p>At the same time, married life is not turning out as Clocks had hoped, and his newly-discovered son has just given him some <em>very</em> bad news . . .</p>