An old threat, now to be executed...literally. Alex Glass helped to put a hardened criminal away thirteen years ago. But Calvin McVie never forgot the police marksman who fired the shot that took him down, leaving a legacy of a limp and a raging thirst for revenge. McVie abducts Glass's daughter, the one his family never knew he had. Glass confides in his friend, Peter McCullough, who turns out to be more than a shoulder to cry on. Glass's personal life disintegrates and his job is on the line. Then a Scot from London is sent to Glasgow to kill McCullough. That's a mistake.