Katerina and Sergei get married. A peasant finds Zinovy's body in the cellar and goes to fetch the police. The police arrive, Katerina and Sergei try to escape but are caught and sent to prison in Siberia. On the way there Sergei makes love to another girl Sonyetka. When Katerina finds out she pushes Sonyetka into a river to her death and finally jumps in herself.