A new killer strikes at the nation's capital as Alex Cross faces his oldest -- and most dangerous -- nemesis. Detective Alex Cross and Bree Stone's wedding plans are put on hold when Alex is called to the assassination scene of a dirty congressman and a corrupt lobbyist. Next, the elusive gunman picks off other crooked Washington, D.C., politicians, sparking a blaze of theories -- is he a hero or a vigilante? The case explodes, and the FBI assigns Agent Max Siegel to the investigation. As Alex battles Siegel over jurisdiction, the murders continue... and it becomes clear they're the work of a professional with insider information. Already in a lethal cross fire, Alex receives a call from his deadliest adversary, Kyle Craig. The Mastermind is in D.C. and vows to finally eliminate Cross and his family for good.