An action-packed hunt across South Africa full of international espionage, twin swaps and prison escapes, by Australia's master of adventure.

Former mercenary Sonja Kurtz's daughter Emma is captured by Russian forces in Ukraine, while working to save priceless antiquities from the ravages of war.

Emma's captor, Major Vassily Orlov, who served time in a South African prison for poaching and murder, is planning a return to Africa - for pleasure and for unfinished business - with Emma in tow.

Sonja's mission seems simple: to hunt Orlov and rescue Emma.

But first, Sonja must reconcile with the estranged daughter who tried to kill her: Emma's twin sister, Fiona.