Katerina's boring, unfulfilling life as the merchant Zinowi Izmailov's wife makes her miserable. Their marriage is childless. Her tyrannical father-in-law Boris Izmailov blames her for this, which she vehemently denies. When Zinowi has to go away on business Boris urges the workers to express their sorrow at being parted from him and forces Katerina to swear to be true to her husband. Axinya, a servant, tells Katerina about Sergey, a newly hired hand, dismissed by his former employers for getting involved with the lady of the house. Sc. 2 The workers torment Axinya, who they've stuck in a barrel. Sergey's attempt to rape her is interrupted by Katerina's arrival. She reprimands the men and demands that they respect and value women. But she then gets into a playful wrestling match with Sergey. Boris turns up while they're rolling about on the ground. Katerina saves the situation by saying she tripped over, and Sergey tried to help her up. Furious Boris sees the men off and warns Katerina that he'll tell his son about the incident. Sc. 3 Boris, who keeps an eye on Katerina all the time, tells her to go to sleep. She longs for tenderness and passion. Sergey appears just as she's gone to bed, pretending he wants to borrow a book. He seduces Katerina; after initial resistence, she gives herself to him. ACT 2 Sc. 4 Boris prowls around the house at night, and spies on Katerina. He's guessed her need for love. While he's fantasising about going to her bedroom, he sees Katerina and Sergey saying goodbye. He catches Sergey and forces Katerina to watch while he nearly whips him to death, before locking him up in the cellar. Feeling hungry, he tells Katerina to prepare some mushrooms. She stirs rat poison into them. While Boris' doubled up in agony she takes the key to the cellar from him. Workers find the dying man begging for a priest; who can only give him a final blessing. Katerina feigns deep mourning. She manages to avoid suspicion being cast in her direction by pointing out that eating mushrooms late at night has proved to be many people's undoing. Sc. 5 Katerina and Sergey spend the night together again. He complains that he can never be the lawful man at her side while Zinovi's alive. Katerina promises to make him a merchant. While Sergey sleeps, Boris' ghost appears to Katerina, cursing her. Then she hears footsteps: Zinovi's come back and crept into the house. Sergey hides. Man and wife have a terrible row because Zinovi heard talk of Katerina's affair. She calls for her lover when Zinovi raises a belt to her. They kill him and hide his body in the cellar. Interval ACT 3 Sc. 6 Katerina and Sergey's wedding day. While making their way to the altar a worker, »the shabby one«, goes into the cellar looking for booze and finds Zinovi's body. He runs off to tell the police. Sc. 7 The corrupt police are in a very bad mood because they weren't invited to the wedding by the Izmailovs. A socialist, suspected of atheism, is interrogated and taken away. The shabby one appears and reports his find. The delighted policemen set off under their captain's leadership. Sc. 8 Wedding celebrations are winding down. Katerina, to whom the priest sings a song of praise, is given three cheers and the bridal couple are called upon to kiss again and again. The guests get drunk and fall asleep. Katerina sees that the cellar's been broken into. She tells Sergey to bundle all the money together and flee, but it's too late: the police arrive. Katerina admits her guilt. The couple are arrested. ACT 4 Sc. 9 Prisoners drag themselves through the steppes on their way to Siberia. When they camp by a water hole for the night, Katerina bribes a guard to let her go to Sergey, and find consolation. But he rejects her and accuses her of screwing up his life. He'd rather try and chat up Sonyetka, another prisoner, who demands stockings in return for love. Sergey goes and asks Katerina – supposedly for himself – for stockings; which she gives him. While he triumphantly withdraws with Sonyetka, Katerina's mocked by the female prisoners. Katerina, tormented by feelings of guilt, is desperate. Sonyetka returns from Sergey's arms and humiliates Katerina further by thanking her for the stockings. Daybreak, and the guards give the order to depart. Katerina dives into the water, dragging Sonyetka with her - they both drown. The prisoners continue on their way.