Grace Macallan's life is on an even keel – at last. But a 9-to-5 career away from the frontline isn't all it's cracked up to be.

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. His murder conviction saw Tommy's fall from power; cast out not for violence but because the victim was his gay lover.

The investigation drags Grace into contact with her McMartin adversaries of old. But the gangland dynasty is under threat and, as it topples, secrets once dead and buried are unearthed.

As she unravels Tommy McMartin's fate, Grace senses someone watching her from the shadows, someone who aches for revenge. An awful dilemma faces her: to expose the truth or let the dead lie still.