Afghanistan, 2012. Mackay Connolly has been medically discharged from the British army following an IED explosion killing three members of his team. He barely survives. To keep Mackay alive, a cutting-edge synthetic bone structure called Phragazom is implanted.
Back in the UK, PTSD engulfs him, leading to a deep depression. However, a budding friendship with Renee Cross, a wheelchair-bound military boxing instructor with her own traumatic past brings a glimmer of hope.
When tragedy strikes again and Mackay-s brother and most of his family are killed at an Australian winery, he is driven to uncover the truth and find his surviving nephew. Together, Mackay and Renee embark on a quest, travelling from one corner of the world to the other to bring those responsible to justice. Mackay, however, has no idea how powerful his synthetic upgrade really is-
