Despite his grim discovery, Tulkinghorn remains undeterred from his ruthless inquiry into Lady Dedlock's past. A young crossing sweeper, Jo, may hold a key to the mystery. Krook discovers evidence in Nemo's room which could provide a crucial clue. Richard and Ada plan their engagement, but receive an unexpected setback. And as Richard begins a career in medicine, Esther meets an attractive young doctor called Allan Woodcourt.

A chance encounter in the country raises intriguing questions for Esther and Lady Dedlock. Legal clerk Guppy, still besotted with Esther, discovers surprising new information about her past and decides to dig deeper still. And Lady Dedlock's secret is far from safe, as Tulkinghorn stumbles across a lead which could destroy her reputation forever.

Tulkinghorn is now close to piecing together Lady Dedlock's secret. Esther struggles to come to terms with the terrible blow she has been dealt. Jarndyce agonises over whether to keep his own feelings for Esther concealed. Lady Dedlock tells Esther something that will change her life for ever.

Esther is shattered by Lady Dedlock's revelation. Richard's obsession with the Jarndyce case has grown to worrying proportions. Guppy puts himself at risk when he gets in the way of Tulkinghorn's enquiries. And Tulkinghorn at last has cast iron proof of Lady Dedlock's guilt, and issues her with a terrible ultimatum.

Richard's obsession with Chancery has left him desperately ill. Ada is pregnant but worries Richard will not live to see the child. When Woodcourt proposes marriage, Esther is torn between her love for him and her commitment to Jarndyce. The impossible finally happens - a result in Chancery - but it's one that will astound everybody.