Ghost in a uniform

April 1943. During the attack of Soviet intelligence officers, a portfolio with important documents of the Wehrmacht disappeared on the German headquarters column. Where he went, the German non-commissioned officer who survived in that battle, whom our counterintelligence was recruited at one time. The signs of Unter are unknown, but, according to reliable data, he is in the Gestapo prison on suspicion of treason. The group of Major Maxim Shelestov was ordered in any way to free the Germans and find out from him where the portfolio is. Shelestov fighters do not get used to the hard tasks. But this time, the matter is complicated by the fact that none of them knows this non-commissioned officer in the face