A master killer calling himself the Sandman is out for revenge in the USA. He's slaughtering not just one person but whole families and complete neighbourhoods, unleashing devastating explosions nationwide, and watching the horror unfold on a sophisticated network of surveillance cameras. No one know why he is committing his crimes.

But Jack Casey - ex-FBI profiler and now cop in a posh Boston suburb - knows this: the Sandman wants him in the middle of the case, and wants him to suffer...even more than when a psychopath's unspeakable crime shattered his own life. Jack's lover knows nothing of his shocking past, but the Sandman has found him and his cutting-edge electronic devices are silently monitoring Jack's every move.

Possible motivations for the Sandman's crimes come gradually to light, and Jack begins to wonder if the evil he is fighting emanated from his own side of the law...