London, during the long, dark days of the Blitz: a city outwardly in ruins, weakened by exhaustion and rationing. But behind the blackout, the old way of life continues: in the music halls, pubs and cafes, soldiers mix with petty crooks, stage magicians with lonely wives, scandal-hungry reporters with good-time girls - 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. And in the shadows Greenaway's old adversaries in organised crime are active again, lured in by rich pickings on the black market.