Thirty years earlier, the Earnshaws live at Wuthering Heights with their children, Hindley and Catherine, and a servant—Nelly herself. Returning from a trip to Liverpool, Earnshaw brings home a young orphan whom he names Heathcliff; Earnshaw treats the boy as his favourite. His own children he neglects, especially after his wife dies. Hindley beats Heathcliff, who gradually becomes close friends with Catherine.

Hindley departs for university, returning as the new master of Wuthering Heights on the death of his father three years later. He and his new wife Frances allow Heathcliff to stay, but only as a servant.

Heathcliff and Catherine spy on Edgar Linton and his sister Isabella, children who live nearby at Thrushcross Grange. Catherine is attacked by their dog, and the Lintons take her in, sending Heathcliff home. When the Lintons visit, Hindley and Edgar make fun of Heathcliff; a fight ensues. Heathcliff is locked in the attic and vows revenge.

Frances dies after giving birth to a son, Hareton. Two years later, Catherine becomes engaged to Edgar. She confesses to Nelly that she loves Heathcliff, and will try to help but cannot marry him because of his low social status. Nelly warns her against the plan. Heathcliff overhears part of the conversation and, misunderstanding Catherine’s heart, flees the household. Catherine falls ill, distraught.

Three years after his departure, with Edgar and Catherine having married in the meantime, Heathcliff unexpectedly returns, now a wealthy gentleman. He encourages Isabella’s infatuation with him as a means of revenge on Catherine. Enraged by Heathcliff’s constant presence at Thrushcross Grange, Edgar cuts off contact. Catherine responds by locking herself in her room and refusing food; pregnant with Edgar’s child, she never fully recovers. At Wuthering Heights, Heathcliff gambles with Hindley, who mortgages the property to him to pay his debts. Heathcliff elopes with Isabella, but the relationship fails and they soon return.

Having reached the present day, Nelly’s tale concludes.