Cryptic clues beyond the newspaper crossword. Old cases that were pushed aside for all the wrong reasons. Will Macleod and McGrath prevail as the Avenging Angel seeks out larger conspiracies? Angry at the escape of the serial killers they pursued across Scotland, DCI Macleod and DI McGrath are assigned to the deaths of prominent business leaders at a conference. When evidence points to the return of the black clad group, the pair must go on a nationwide man-hunt before they strike again at the heart of the financial sector. Sometimes, we must all take the blame.