Berlin, Christmas 1979. The Wall cuts through the city like a scar. On one side, the glare of neon; on the other, the darkness of control. When a covert mission falters, two Americans find themselves hunted through the snow by a Soviet armoured carrier. At the border, a single decision by a Soviet adviser alters the course of events and threatens to turn the Cold War hot. It is a story of espionage, loyalty and betrayal, written by a man who lived through the very world he describes.