The narrative opens with the arrival of a financially desperate Russian general and his entourage at a fashionable spa town named Roulettenberg, where the household waits with feverish anticipation for news of the matriarch's impending demise and subsequent inheritance. Among them is Alexei Ivanovich, a family tutor who is hopelessly and destructively in love with the general's imperious stepdaughter, Polina Alexandrovna. Alexei is plunged into a turbulent world of social posturing, humiliating debt, and complicated romantic tensions involving a mercenary French marquis and a mysterious, wealthy Englishman named Mr. Astley.
Driven by a mixture of deep despair and Polina's arbitrary demands, Alexei ventures into the glittering, squalid halls of the Casino to play roulette. To his own astonishment, he experiences a sudden, intoxicating run of luck, discovering an innate affinity for the unpredictable rhythms of the gambling table. This first taste of winning awakens a dormant, reckless compulsion within him, shifting his worldview and setting him on a collision course with destiny.
The fragile household dynamics are utterly shattered by the unexpected arrival of the formidable grandmother, Antonida Vassilievna, who storms into the resort in a wheeled chair, completely alive and fiercely lucid. Declaring that the general will not receive a single kopeck of her fortune, she immediately heads to the Casino, where her initial beginner's luck quickly transforms into a catastrophic addiction. Within two days, she systematically gambles away her entire immense fortune, returning to Moscow a pauper and leaving the fortune-hunters stranded.
As the family structure collapses, the marquis deserts them after realizing no inheritance is forthcoming, and the general sinks into a state of vegetative delusion, eventually manipulated into a humiliating marriage by the calculating Mlle. Blanche. Alexei, consumed by his obsession with both Polina and the roulette wheel, finds himself completely untethered from society, morality, and his former self. He drifts into a state of total degradation as a menial worker, sustained only by the intermittent, feverish hope of returning to the tables.
The story reaches its emotional and psychological climax when Alexei, having lost everything, experiences a miraculous night of high-stakes gambling where he wins two hundred thousand francs. In a triumphant frenzy, he brings the immense fortune to Polina, hoping to prove his devotion and buy her respect. However, her pride is wounded, and she rejects the money before fleeing, leaving Alexei behind in a state of shattered realization.
The novel closes with Alexei wandering the towns of Europe, trapped in an inescapable cycle of addiction and ruin. He recognizes his complete moral and spiritual bankruptcy, yet remains utterly powerless to break free from the magnetic pull of the roulette wheel. His mind is permanently altered, haunted by the memory of what might have been and the hollow echo of the croupier's call.
