It was dangerous for Richter to come to England as a spy, even more so when he was "turned" by a young British captain into a double agent. But in 1945 with a new identity he returned to start a new life, safe from every threat; except the cruelest one of all-coincidence. When Richter's cover is blown, there is just one man who stands a chance of getting him out of East Germany alive-the man who had "turned" him seventeen years before.