The events of the Russian crime drama series "Granica. Tayozhnyj roman" unfold in the 1970s near the Soviet-Chinese border. Several families of military personnel live in a small military garrison. The fates of these people are tightly and inseparably intertwined. The main characters of the story are the stern Captain Nikita Goloschekin, his wife Marina, and her secret lover Vanya Stolbov. The complex relationships between the participants gradually escalate into a true tragedy.