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

As her dogged determination propels her closer to the criminal underworld than ever before, Jen becomes the target of some dangerous and powerful people. The fact that her estranged father is also present in the city, for reasons of his own, only adds greater confusion and risk.

In the absence of anyone she can truly trust, Jen must 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.