These chapters trace a sequence of social manoeuvres and private reckonings that bring the novel’s themes—conflicting loyalties, self-deception, social performance, and the moral complexity of marriage—into sharp relief.

After an evening at the opera Lord Warburton encounters Isabel Archer seated with Gilbert Osmond. His puzzled, lingering interest—courteous yet withheld—recurs; he leaves Rome, returns, and his presence becomes a quiet pressure on the household. Ralph Touchett, Isabel’s ailing, ironic cousin, watches with private alarm: he had hoped Isabel’s life would take another course and foresees possible unhappiness. Osmond, a cultivated, fastidious American expatriate, courts Isabel with restraint; she accepts and they marry in Florence in a modest ceremony. Mrs Touchett (Aunt Lydia) and Ralph disapprove—Lydia suspects Madame Merle’s hand, Ralph perceives danger in Osmond’s aesthetic, circumscribed world.

Pansy, Osmond’s child, appears as cultivated, unworldly and wholly devoted to her father. Her suitor, Ned Rosier, is eager but discouraged by Osmond’s cold disfavor. Warburton unexpectedly shows interest in Pansy; his attentions set off jealousy and calculation. Osmond, with polite severity, urges Isabel—explicitly and through Madame Merle’s insinuations—to use any influence she might have with Warburton to secure Pansy’s future. Isabel, already constrained by the tensions of her marriage, endures these appeals while privately doubting her husband’s motives.

Social scenes—rooftop galleries, the Capitoline, Roman salons, Palazzo Roccanera—reveal shifting alliances. Madame Merle, worldly and ambiguous, oscillates between discreet intervention and calculating self-interest; Henrietta Stackpole, blunt and energetic, arrives determined to see the truth. Caspar Goodwood, an earnest suitor from New York, returns to Europe, learns of Isabel’s marriage and departs distressed but later reappears to render practical service. Ralph, physically declining, remains to observe.

At Palazzo Roccanera Warburton takes a formal farewell of Pansy; Osmond, with cold fastidiousness, accuses Isabel of manoeuvring—an accusation that clarifies his habit of private cruelty. Rumours and the Countess Gemini’s disclosures hint at a more compromising past for Madame Merle and ambiguity about Pansy’s parentage; Isabel’s suspicions harden. Goodwood and Henrietta accompany Ralph back to England; at Gardencourt he dies after an intimate reconciliation with Isabel, having arranged legacies and confidences.

Confrontations follow: Goodwood, desperate, presses Isabel to abandon her marriage; he kisses her at Gardencourt and she recoils, choosing return to Rome. Isabel visits Pansy at a convent—submissive and resigned to her father’s will. Isabel confronts Madame Merle; their exchange is curt and decisive, and Merle resolves to leave for America. The sequence closes with Isabel at Ralph’s funeral, the formal settlement of affairs, Warburton entering a new engagement, and the principal characters left to face the ambiguous moral and practical consequences of winter’s revelations.