1944. Abwehr intelligence school operates in a concentration camp near the Belarusian city of Astapovichi. There, under the guise of traitors, our agents were introduced - SMERSH officers Pyotr Starikov and Evdokim Lysukhin. Having gained the trust of the school leadership, the officers begin to form sabotage groups from among Soviet prisoners of war. In fact, Smershevites organize mass escapes undercover for our people. However, the Nazis suddenly suspected something was wrong. Counterintelligence officers understand that they are close to exposure. They are preparing to give the last battle, not suspecting where the real threat is lurking...