Oddball is tasked with finding out who murdered his fellow agent, Marion. He believes it is linked to the disappearance of billions of pounds from government coffers. Oddball knows that catching Marion's killers will require footwork by him, but discovering how massive sums of taxpayers' money are missing will require someone with specialised computer skills.

Harriet Lewis is such a person, but she carries the scars of her childhood abuse, which makes her hard to handle. Oddball asks Saxon to help and, much to everybody's surprise, Harry Lewis is no longer the introvert that most people know her to be. She tears through firewalls like they are tissue paper and leads Oddball to his colleague's killers while uncovering dark secrets about the missing money. In an unexpected twist, Harry discovers something about herself that she had never suspected.