Jane tells her own story from childhood. Orphaned and unloved, she is raised at Gateshead by her aunt Mrs. Reed, who favours her own children and treats Jane as an unwanted dependent. After a violent quarrel with her cousin John and a terrifying punishment locked in the red-room, Jane is sent away to school, having learned early what it is to be powerless and to burn against unfairness.
At Lowood, a charity school run on cold, hunger, and humiliation, Jane meets two figures who shape her. Helen Burns bears cruelty with a patience and faith Jane cannot match but never forgets, and the superintendent Miss Temple offers steadiness and justice. A typhus epidemic kills many girls, including Helen, who dies in Jane's arms. Jane stays on as pupil and teacher, then leaves to seek a wider life.
Hired as governess at Thornfield Hall, Jane comes to love its master, the abrupt, troubled Mr. Rochester, and slowly learns he returns her feeling. Strange events trouble the house: a hidden laugh, a fire in the night, a guest attacked. When Rochester proposes, Jane accepts him as an equal, declaring that though poor and plain she is no bird to be netted, with a soul and will of her own.
At the altar the marriage is stopped: Rochester already has a living wife, the mad Bertha Mason, kept locked in the attic of Thornfield. He begs Jane to stay with him anyway, pleading his misery, and her whole heart longs to comply. She refuses, holding that she must keep the law and respect herself the more the more friendless she is, and she flees Thornfield at dawn with almost nothing.
Destitute and near death, Jane is taken in by the Rivers siblings, who prove to be her cousins; an inheritance makes her independent, and she shares it with them. The cold, devout St. John presses her to marry him and serve as a missionary's wife, a union of duty without love that she nearly accepts. A mysterious cry of her name turns her back to Rochester, whom she finds blinded and maimed but free, his wife dead in a fire; now able to come to him as an equal, she marries him at last.