Still reeling from a life-threatening experience on the coast of Calais, daredevil climber Jen Shaw finds herself in Glasgow for a funeral, devastated with grief and in search of answers.

As her dogged determination propels her closer to the criminal underworld than ever before, Jen and her family become the target of some dangerous and powerful people with links to the heart of Glasgow's Police Force.

In the absence of anyone she can truly trust, Jen has no option but to rely on her own instincts and everything she's learnt from her close bond with police officer Nick Crawford for survival. Even if it means going undercover herself and disappearing into the city's dark underbelly.