Autumn 1941. The Wehrmacht is rushing to Moscow, German agents are terrorizing the Soviet rear. In an effort to neutralize them, the NKVD begins a covert operation. Philology teacher Irina Voskresenskaya and State Security Major Pavel Nechai were instructed to portray a married couple and gain confidence in the few monarchists left in Moscow. Their goal is to create an underground organization "The Throne", which will become a bait for the German secret services.