Cheryl Davidson was happy with husband Leo, watching her beloved son, Dean, grow into a handsome young man, dreaming of the paths his life would take. Until the day that Dean was murdered, his body dumped in an isolated scrapyard with a bullet in his head, and Cheryl's world exploded. Discovering that Dean had been mixed up in the Glasgow underworld, and worst of all, that Leo had brought him in, means that Cheryl's sanity is hanging by a thread. Overwhelmed by grief and with no one left to trust, Cheryl plans to take deadly retribution on the family that caused her son to be killed. Cheryl might be up against the formidable Janey Hallahan, the woman who runs Glasgow gangland with guns and fear, but Janey and the Hallahans might discover that a grieving mother with nothing to lose might be the most dangerous opponent of all. . .