Fleur tells Soames she is in love with Jon and persuades him to visit Irene.
Fleur visits Jon at the farm; Fleur goes to Robin Hill to meet Jon's parents, without revealing her identity.
Fleur and Jon wonder about the secret that divides their families. Soames arranges a house party to distract Fleur and pairs her with the dashing Michael Mont for tennis.
The Forsyte family gathers in London, where Fleur and Jon meet as children; Fleur and Jon meet again 11 years later, and Fleur tries to find out why everyone seems to want to keep them apart.
Soames divorces Irene; both Irene and Annette are pregnant; Soames tells his dying father he has a son, even though the baby's a girl.
Despite his feelings for Annette, Soames's feelings for Irene are easily rekindled. His obsession with her returns when he sees her again, even after twelve years.
With the war looming, Winifred takes Dartie back; for divorce evidence, Soames continues to employ detectives to follow Irene.
Soames has found happiness; Winifred takes Soames' advice to seek a divorce as Soames pursues his own; Irene flees to Paris, followed by Jolyon.
Soames rapes Irene; on his way to confront Soames, a furious Bosinney is hit by a cab; Old Jolyon reunites with his family and moves to Robin Hill.
Irene leaves Montpelier Square forever; June confronts Soames with the truth; Old Jolyon discovers Irene at Robin Hill and a friendship begins.
Irene and Bosinney fall in love; Soames takes Bosinney to court due to his overspending.
Irene recoils from Soames' entreaties; Somes challenges Bosinney and instigates legal action; June is horrified by the lawsuit.
Soames designs a retreat to save his marriage; Jolyon reconciles with his son's family; Winifred's marriage sours; Soames' dream house materializes.
Winifred announces her engagement; young Jolyon reveals his feelings for his June's governess; Soames' search for a wife leads him to Irene.