On a hot July evening in St. Petersburg, Rodion Raskolnikov, a poor former student living in a cupboard-like garret, walks out to rehearse a crime he can barely admit he is planning. Crushed by poverty and isolation, he has nursed a theory that certain extraordinary men are permitted to transgress ordinary morality, and he means to test whether he is one of them by killing and robbing an old pawnbroker.
He commits the murder, and in a panic kills the pawnbroker's gentle half-sister Lizaveta as well, who walks in on him. He escapes with a few worthless trinkets he never uses. From this point the novel becomes a study of aftermath: fever, delirium, half-confessions, and a mounting terror of discovery. The detective Porfiry Petrovitch, who has read Raskolnikov's published article on the rights of extraordinary men, plays a patient psychological game, certain of his guilt long before he can prove it.
Around Raskolnikov move the people who pull him in opposite directions. His loving mother and sister Dunya arrive in the city, and Dunya is courted by the cynical Luzhin and pursued by the predatory Svidrigailov. The drunkard Marmeladov dies under a carriage, and his daughter Sonia, who has been driven into prostitution to feed the family, becomes the figure through whom Raskolnikov is offered a way back. Their bond forms the moral centre of the book.
The turning point is the scene in which Sonia reads him the gospel account of the raising of Lazarus, and later the moment when he confesses the murder to her. She does not argue him out of his theory; she tells him to go to the crossroads, kiss the earth he has defiled, confess aloud that he is a murderer, and accept suffering as the price of life again. Slowly, against his pride and his reasoning, this counsel takes hold of him.
Raskolnikov finally gives himself up and is sentenced to Siberia, where the epilogue finds him still defending his theory and refusing to repent, ashamed only of having failed rather than of the crime itself. Only at the very end, broken by illness and reached by Sonia's steady love, does something give way. The novel closes not on his redemption complete but on its beginning, calling itself the story of a man's gradual renewal and leaving the long work of regeneration ahead of him.