It's a mass execution: six people systematically shot and killed in a private Virginia mansion-one of them the White House Chief of Staff. But that isn't the reason Sean Drummond is called in. Newly enlisted in a CIA cell called the Office of Special Projects, the Army lawyer knows the bodies are just a warning. Because the killer left a note.

Now the hunt begins for the ultimate hitman: brilliant, coldhearted, with an insider's knowledge of D.C. For Drummond, it's the greatest challenge of his career, a terrifying cat-and-mouse game with unthinkable consequences. If he fails, the world will never be the same-and someone will collect the $100 million bounty on the President's head.