In a provincial town on the Volga River, the young and sensitive Katerina marries Tikhon, a violent drunkard, and thus enters the crude milieu of greedy salesmen, the "dark kingdom". Her mother-in-law, Kabanikha, rules the family with an iron fist and endlessly harasses Katerina. One day, when Tikhon is away, she meets Boris, a man who embodies everything Katerina is longing for.

The film is based on The Governor, a play by Leonid Andreyev. V.I. Kachalov plays the governor of a small Russian province who tries to treat the people under his authority with kindness and equanimity. But when a local factory goes on strike, the governor buckles under to pressure from the Tzar and orders the wholesale slaughter of the strikers. He pays for this betrayal of his trust with his life -- at the hands of a courageous Bolshevik spy.