Washington D.C., 1953. As the Cold War heats up, the CIA is reeling from a double agent within their midst. Someone is selling secrets to the Soviets, compromising missions around the globe. Undercover agents have been assassinated, and anti-Communist plots are being cut short in ruthlessly efficient fashion. The traitor, whose code name is Protocol, can compromise the entire agency. George Mueller seems to be the perfect man to help find the mole. The Director trusts him. Mueller, though, has secrets of his own, and as he digs deeper into the case suspicion begins to fall on him as well. Until Protocol is found, no one can be trusted, and everyone is at risk.