Afghanistan veteran Sean Bourke's world explodes when an IED detonates in South Africa's Sabi Sand Game Reserve.

On a routine anti-poaching patrol, Sean and his tracker dog Benny watch in horror as over-eager rookie Tumi Mabasa is almost killed, and her dog gravely injured, in the explosion.

Along with Tumi and best mate Craig Hoddy, Sean is determined to hunt down the elusive bomb maker who has introduced this destructive weapon to the war on poaching.

But Sean is his own worst enemy. Haunted by nightmares of the war and racked with guilt from driving away his ex-wife, Christine, he soon discovers she and Craig in the midst of an intense affair.

And there's another enemy at play . . .

As bombs target Sean's unit, can he get himself back on track and win the fight for Africa's wildlife - and Christine - before it's too late?