A double bill of dark and terrifying investigations for detective Red Metcalfe (Ken Stott). The first series, comprising 'The First Killings' and 'The Reckoning', is set in sweltering London summer. A serial killer is targeting wealthy men, slaughtering them and replacing their tongues with silver spoons. The man appointed to track the murderer down is Detective Superintendent Red Metcalfe (Ken Stott), renowned for his ability to get under the skin of any killer. However, this knack seems to desert the detective as the body count continues to rise without providing the slightest clue to link the otherwise unrelated victims. In the second series, 'Vengeance Is Mine', things get personal for DCI Metcalfe when his own estranged brother is found stabbed at the busy Leadenhall Market. As the body count rises, the horrifying truth begins to dawn: a sadistic serial killer is on the loose, and none of the investigators - or their nearest and dearest - are safe.