Former Chief Constable Bob Skinner is long out of the police force but trouble has a habit of following him around. So it is that he finds himself in the Palace of Westminster as a shocking act befalls the nation. Hours before the Prime Minster is due to make a controversial statement, she is discovered in her office with a letter opener driven through her skull. Skinner is swiftly enlisted by the Security Service to lead the investigation. Reunited with Met Police Commander Neil McIlhenney, he has 48 hours to crack the case. There are many in the tangled web of government with cause to act. But the outcome will be one that not even Skinner himself could predict?