London during the long, dark days of the Blitz: a city outwardly in ruins, weakened by exhaustion and rationing - and DCI Edward Greenaway keeps a careful eye on everyone. Out on the streets, something nastier is stirring: London's prostitutes are being murdered, their bodies left mutilated to taunt the police. As he follows a bloody trail through backstreets, Greenaway must use all his skill to stop the slaughter.