A former CIA officer and curator of the CIA Museum reveals the untold story of Ernest Hemingway's secret life as a spy for both the Americans and Soviets before and during World War II, and explores how his espionage activities influenced his literary work.

A tale set in an alternate-universe, post-World War II era finds precarious peace agreements between England and the USSR threatened by the murders of warlocks responsible for safeguarding British national security, a situation that falls into the hands of two supernaturally enhanced siblings and a former spy who would protect the queen.