It's a typical cold November night and DS Dennis Mline, a very untypical policeman, is in the car park of the Traveller's Rest Hotel awaiting instructions to kill three unarmed men. Cynical and jaded, Milne likes to think that he's hurting only those who deserve it. But this time he's been duped. Instead of shooting drug dealers, he kills two respectable customs officers and an accountant, their deaths starting off an investigation that sees him, his sideline and his conscience heading for trouble. Less than twelve hours later Milne is out on the streets of London's King's Cross trying to solve a gruesome murder. Eighteen-year-old Miriam Fox has been found dead by Regent's Canal - her throat slashed. Determined to right a monstrous wrong, Milne trawls the murky world of street kids and the teenage vice trade. But his persistent enquiries soon implicate fellow police officers, and the mysterious Carla Graham, manager of the hostel where Miriam once stayed. Increasingly desperate to find Miriam's killer, Milne uncovers a web of depravity far more shocking than he could ever have imagined. Can he evade arrest for his own crimes and solve a case so sickening that it may provide the key to his own redemption? The clock is ticking and everyone's watching their backs as a war of morality is fought in the mind of one renegade policeman.