World War II has been over for 2 years, and the Iron Curtain is firmly in place between East and West. Tech-four Jim Colling, a member of the U.S. occupation force in Germany, is looking forward to the end of his enlistment and returning to the States and settling into civilian life with the beautiful German girl he plans to marry. However, when an American Air Force bomber with A-bomb secrets aboard is forced down in Soviet territory, Colling is once again called upon by his old friend in Army intelligence, Lt. Col. Quarles, to employ his language skills and undercover experience to extricate the crew of the plane and bring them safely to the West. The task is the most dangerous that Colling has thus far faced in working for Quarles, and one in which his ingenuity will be tested to the limit, when he has to engineer his own escape from a former Nazi concentration camp.