Former CIA agent George Mueller arrives in Havana in August 1958 - the last months before the fall of Cuban dictator Fulgencio Batista - to look into the activities of Toby Graham, a CIA officer suspected of harboring sympathies for the rebel forces fighting the unpopular Batista regime. Mueller knew Graham as an undergraduate, and later they were colleagues in Berlin fighting the Soviet NKVD. Under the guise of their long acquaintance, Mueller is recruited to vet rumors that Graham is putting weapons into the hands of Castro's forces.
Washington DC, 1953. The Cold War is heating up: McCarthyism, with all its fear and demagoguery, is raging in the nation's capital, and Joseph Stalin's death has left a dangerous power vacuum in the Soviet Union. The CIA, meanwhile, 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.