When a young boy goes missing and another is found dead, the race is on to track down the perpetrator. But DI Charlotte Savage has barely begun to unravel the tangle of clues when her boss drops her from the investigation and moves her to a cold case. Meanwhile, a mysterious figure calling himself the Pastor is threatening to enact his own form of justice. He wants to play executioner while letting the public choose the criminals. Amid the chaos of a media panic and with a populace baying for blood, Savage must work out how her cold case relates to the murdered child and try to find the missing boy before the killer strikes again. Can she enlist the help of the Pastor? And if so is she willing to pay the price he demands?