Charles Bovary, a plodding, good-natured officer of health, marries Emma Rouault, the daughter of a farmer he has treated. Emma was raised in a convent, where she fed less on devotion than on keepsake albums and romantic novels, and she comes to marriage expecting the felicity, passion, and rapture those books had promised. Within months the reality of life with a slow, contented husband who cannot share or even notice her inner world leaves her restless and asking herself why she ever married.
A grand ball at a nobleman's chateau shows Emma a glimpse of the elegant life she believes she was meant for, and the memory poisons everything that follows. The couple move to the small town of Yonville, where Emma gives birth to a daughter she struggles to love and meets a sentimental young clerk, Leon, whose tastes echo her own. Their attachment stays unspoken until Leon leaves for Rouen, and Emma is left more starved than before for the emotion she keeps reading about.
Into this hunger steps Rodolphe Boulanger, a wealthy, experienced landowner who sees Emma's boredom and decides to seduce her, sizing her up coldly as a woman gaping after love. They begin an affair, and Emma throws herself into it with all the abandon her novels taught her, even planning to flee with him. Rodolphe, who never intended anything so binding, abandons her with a letter, and the shock pitches her into a long illness.
Recovering, Emma rekindles things with Leon during trips to Rouen, and the second affair becomes a frantic double life of lies, snatched meetings, and ever-grander wants. To sustain it she signs note after note with the draper Lheureux, who feeds her appetite and her vanity while the interest compounds. The debts swell in secret until a court order to seize the household property finally exposes how far she has overreached.
Cornered, Emma begs everyone she can think of for money, including Rodolphe and Leon, and is refused or humiliated at every door. Seeing no escape from disgrace, she swallows arsenic from the pharmacist's storeroom and dies slowly and horribly. Charles, broken by grief and by the love letters he later finds, soon dies as well; their orphaned daughter is sent off to work in a cotton mill, while the smug pharmacist Homais flourishes and is awarded the cross of the Legion of Honour.