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A former white officer, and now an employee of the NKVD, martial artist Viktor Spiridonov meets the disgraced Soviet intelligence agent Vasily Oshchepkov, who studied judo in Japan for a long time. They quickly find a common language, because both are obsessed with the idea of \u200b\u200bcreating a national art of self-defense. But the joint work soon turns into an irreconcilable confrontation. Intrigues, betrayal, emotions will predetermine the tragic fate of the two great creators of sambo.