"Zivon Marin was one of Russia's top cryptographers until the October Revolution tore apart his world. Forced to flee to England after speaking out against Lenin, Zivon is driven by a growing anger and determined to offer his services to the Brits. But never far from his mind is his brother, whom Zivon fears died in the train crash that separated them. Lily Blackwell sees the world best through the lens of a camera and possesses unsurpassed skill...