The Gray Man is CIA operative Court Gentry, aka, Sierra Six. Plucked from a federal penitentiary and recruited by his handler, Donald Fitzroy, Gentry was once a highly-skilled, Agency-sanctioned merchant of death. But now the tables have turned and Six is the target, hunted across the globe by Lloyd Hansen, a former cohort at the CIA, who will stop at nothing to take him out. Agent Dani Miranda has his back. He'll need it.