Alone, trapped in the darkness and with no way out, Bart Campbell knows that his chances of being found alive are slim. Drugged and kidnapped from his Edinburgh home, the realization soon dawns that he's been locked inside a shipping container - but what Bart doesn't know is that he's now heading for France, where his unspeakable fate is already sealed.... DCI Ava Turner and DI Luc Callanach are working on separate cases that soon collide as it becomes clear that the men and women being shipped to France are being traded for women trafficked into Scotland. With so many lives at stake, it seems an impossible task - but there's no option of failure when Bart and so many others will soon be dead...