Detective Kostenko is traveling between Moscow and Sukhumi trying to find the responsible for double homicide.

Abkhazia, 1921. Alkhas, a Bolshevik underground worker, returns to his native village to strengthen Soviet power in his homeland. Aditsa, the prince's daughter, falls in love with Alkhas, but her father would like to marry her to Prince Safarbey. The prince did not accept the new power and took up arms. Safarbey's gang kills Red Army liaison Korablev...