Could you betray your government to save your country? Sam Barker works in IT at the Home Office. All he wants is to get his work done and enjoy a quiet existence. But when he’s caught up in a terrorist attack on the London Underground, his life is turned upside down. As he lies recovering in his hospital bed, a shadowy figure visits him and tells Sam not only is he a key witness to the attack, but he has unique access to information which could blow open a huge conspiracy and bring down the British government. Will Sam risk everything he knows and loves to save his country?

Time doesn't wait for the truth. In Edinburgh, the British Prime Minister prepares to launch a worldwide project to tackle climate change. But there's a far more sinister motivation behind her plans. After successfully thwarting a terrorist attack in London a few months earlier, Sam Barker is tasked with investigating a scheme which will turn his life—and the world—upside down. As he delves deeper into the network of players, Sam uncovers a conspiracy which leads to the one person he loves the most—his son. But in revealing the facts, Sam risks flushing out a far more sinister, unknown enemy—a rogue agent inside The Firm who will stop at nothing to stop Sam from exposing the truth.