Tom Byrne has come a long way since his days as an idealistic young lawyer. Now he'll work for anyone --- as long as the money's right. So when a UN official asks him to take on a dubious job, he accepts. A suspected suicide bomber shot by UN security staff has turned out to be a harmless old man, and Tom must placate the family. But it soon emerges that the victim was not quite the innocent man he seemed to be.
Alongside the dead man's daughter, Rebecca, Tom discovers a hidden brotherhood united in a worldwide mission that has caused hundreds of unexplained deaths. Pursued by those ready to kill to stop him, Tom must unlock a secret buried for more than sixty years --- the last great secret of the Second World War.