July 1941. German troops attack Moscow. The Supreme Commander-in-Chief's Squad decides to use a new secret weapon – radio-controlled landmines. Special groups of sappers pass houses, railway stations, factories. The Germans suffer losses. Hitler ordered in any way to obtain a Russian mine and neutralize it. NKVD operatives, having arrested one of the exiled German agents, learn about the plans of the Nazis. Saboteurs are also supported by the Wehrmacht, which launches an offensive on this section of the front. But the main thing is that there is a spy at the factory who helps the Germans, and you need to find him and neutralize him as soon as possible.