The narrative centers on Maggie and Tom Tulliver, growing up at the old mill house by the Floss River. Maggie is a fiercely intelligent and imaginative child whose intense emotional nature constantly leads her into trouble with her conventional family, whereas her practical brother Tom is the steady, favored sibling. The core conflict arises from Maggie's desperate need for affection and her inability to conform to the strict behavioral norms expected of young girls in her era. As the children navigate daily life, minor disputes—such as neglected pets or impulsive haircuts—frequently escalate into emotional crises for Maggie, who measures her entire worth by whether Tom loves and forgives her.
Throughout the early years, their relationship is marked by volatile reconciliations and deep-seated devotion, even as their opposing temperaments pull them in different directions. Maggie struggles against the constant reprimands of her aunts and mother, finding solace only in her books, her rich daydreams, and her father's rare moments of gentle support. Driven by a sudden, overwhelming sense of rejection after a family quarrel, Maggie attempts to run away to live with the gypsies, hoping to find a world that better accommodates her untamed spirit. Although this childhood rebellion is short-lived, it foreshadows the lifelong struggle she will face in trying to reconcile her passionate intellect and desire for love with the harsh limitations placed upon her by society. The early chapters lay a poignant foundation for the complex family dynamics, loyalties, and heartbreaks that will shape the siblings' future lives.