Steve Williams is the son of a successful retired British Intelligence field officer. Although Steve has a reasonably successful career as an analyst at MI6, he harbours greater ambitions. Miranda Carlos, a glamorous field officer, suffers an incapacitating injury and is unable to undertake an important intel-gathering assignment. The mission is so important that a suitable imposter must be sent in her place. Surprisingly, the computer picks Steve as having the strongest resemblance to the sexy Miranda. Although keen to take the assignment, he has to consider if he is willing to pay the necessary price in the line of duty. His loyalty to his country is tested as he faces the transformation that is required - especially given the warnings that some of it may be irreversible. As Steve begins to unearth plans for a devastating terrorist strike, he finds himself fighting for his life and, not knowing who he can trust, he is thrust into a terrifying race against time to prevent a horrific atrocity.