After single-handedly intervening in a deadly terrorist attack in Mali, SAS Warrant Officer Jamie 'Geordie' Carter is denounced as a lone wolf by jealous superiors.
Now a Regiment outcast, Carter is given a second chance with a deniable mission: locate SAS hero-gone-rogue, David Vann.
Vann had been sent into Afghanistan to train local rebels to fight the Taliban. But he's since gone silent and expected attacks on key targets have not happened.