In the quaint town of Concord, Massachusetts during the tumultuous times of the Civil War, the March sisters—Meg, Jo, Amy, and Beth—navigate a life of genteel poverty alongside their devoted mother. Their father, serving in the Union Army, left the family in the care of the strong-willed woman affectionately known as "Marmee" by her daughters. Despite their financial struggles, Marmee instills in them the values of compassion and charity, particularly in anticipation of the upcoming Christmas season.
While the self-absorbed Amy often laments their lack of wealth and social standing, Jo, an aspiring writer, entertains her family with captivating stories and engaging plays. The youngest sister, Beth, is a gentle and shy soul who plays along on a piano that produces a rather off-key sound. Meanwhile, Jo strikes up a friendship with Theodore "Laurie" Laurence, the charming grandson of their wealthy, grumpy neighbor, James Laurence.
One winter evening, Jo impresses Mr. Laurence with her boldness and her positive influence on the somewhat brooding Laurie. He invites the March sisters to attend a splendid costume ball at his grand home. At the ball, Meg catches the eye of John Brooke, Laurie's tutor, and Jo shares a dance with Laurie, while Amy and Beth eagerly watch from the staircase. Mr. Laurence's stern demeanor softens at the sight of Beth, who reminds him of a beloved granddaughter, leading him to offer her the use of his exquisite grand piano. Unfortunately, the evening takes a turn for the worse when Amy and Beth overhear gossipy remarks from the rich Mrs. Gardiner and her daughter about Marmee.
As winter evolves into spring, Laurie's affection for Jo deepens, but she steadfastly rejects his advances, stating that while she cherishes their friendship, she has no intention of marrying. Concerning her sister's budding feelings for Mr. Brooke, Jo worries that marriage might jeopardize their sisterly bond.
With the arrival of spring, Marmee receives troubling news that Mr. March has been injured and is recuperating in a Washington, D.C. hospital. In a desperate attempt to secure train fare, Jo confronts her wealthy aunt, Aunt March, resulting in a heated argument as Jo struggles to maintain the decorum expected of her. Ultimately, Aunt March assists the family, but not before Jo sacrifices her long, beautiful hair, selling it for funds. In her absence, Beth contracts scarlet fever, and the sisters come to terms with how crucial Marmee is to their well-being. Just as Marmee returns, Beth's fever breaks, leading to a heartfelt family reunion with the surprise arrival of Mr. March.
The months roll by, and while Meg marries Mr. Brooke, Laurie proposes to Jo, only to be turned down. She explains that she feels out of place in society and wishes to devote herself to a writing career. Heartbroken, Laurie departs for Europe, leaving Jo feeling lonely with the absence of her sister and best friend.
Relocating to New York, Jo boards with the Kirke family, where she meets Prof. Bhaer, the children's German tutor. He opens her eyes to art and culture, but when he later criticizes her sensationalist writing, Jo is devastated. In a moment of vulnerability, she confides in Prof. Bhaer about her feelings of abandonment by Laurie and her disappointment that Aunt March took Amy to Europe instead of her. The affectionate tutor, having fallen for Jo, encourages her to write authentically, resulting in her decision to return home, aware of Beth's deteriorating condition.
Upon her return to an almost-empty house, Jo learns that her beloved Beth is near death. She dedicates her time to care for her courageous sister, who faces her illness with remarkable grace. After Beth's death, Jo pours her grief into a novel titled My Beth, which she sends to Prof. Bhaer for his critique. Not long after, Meg, now a mother of twins, informs Jo that Laurie and Amy have fallen in love during their time in Europe and are set to marry. Though genuinely happy for them, Jo feels the sting of loneliness and longs for love.
Eventually, Laurie and Amy return as a married couple, and the March family joyfully celebrates their reunion. The cheerful atmosphere is briefly disrupted when Prof. Bhaer arrives with Jo's published novel. Misunderstanding the situation when Laurie greets him, he assumes that Jo has wed her friend and politely declines to join the festivities. Unwilling to let him leave, Jo chases after Prof. Bhaer, where he passionately proposes to her. Overwhelmed with happiness, Jo accepts, leading him back to the warmth of her family who eagerly awaits their joyous occasion.
