In September 1942, on one of the Baltic islands, the Germans tested the newest high-power weapon. As a target, the Nazis used the local concentration camp, which was ultimately completely destroyed. However, one of the prisoners not only managed to survive, but also contacted the active underground. Information about the new weapon of mass destruction reached Moscow. The leadership of the NKVD orders a group led by Major Maksim Shelestov to seize secret documentation on the production of shells and, if possible, destroy the very plant…