Maya, Oscar's second wife, finally arrives in London. But as the family try to heal divisions and look to the future, Hannah and Nathan are still fighting to save their marriage.

Hannah, for so long adept at navigating other people's lives and relationships, is confronted with painful questions about her own marriage.

An online illicit dating website is hacked, providing Hannah with an explosive case. At home, Ruth hosts a dinner party for all the family with disastrous consequences.

Hannah represents a woman fighting to save the embryos created during a marriage that is now ending in divorce. Oscar’s return continues to have an impact on the entire family.

Things become increasingly complicated for Hannah as she faces Christie’s ex-wife in a tricky prenup, and the three sisters meet their father for the first time.

A leading divorce lawyer finds business is personal when she leaves the family firm for a rival and finally faces her estranged father, who walked out 30 years ago.