Kaltrina Dervishi is a prostitute on the run from Serbian gang leader Fisnik Abazi. The police want her to give evidence against him: Abazi wants her dead. Only her lawyer, Keira Lynch, can keep that from happening.
What Keira doesn't realise is that this is a case with global repercussions and it's not long before the CIA come calling. If Kaltrina talks and Abazi is imprisoned, then certain information will come to light - information that men will go to any lengths to keep buried.
What they don't realise though is that Keira Lynch isn't your typical Glasgow lawyer. When she was eight years old she killed a man, and as they're about to find out, she's at her most dangerous when threatened.