A 9-to-5 job away from the frontline isn't all it's cracked up to be for Grace Macallan. So when she's sent to investigate a suicide at Glasgow's notorious Barlinnie prison, Grace gladly escapes her desk. The dead inmate is Tommy McMartin, heir to a ferocious criminal family - though his murder conviction for killing his gay lover saw him cast out. The investigation drags Grace into contact with old Mcmartin adversaries - but the dynasty is under threat, and as it topples, buried secrets are unearthed. As she unravels Tommy's fate, Grace senses someone watching her - someone who aches for revenge...