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.

Tulkinghorn believes Lady Dedlock is in his power, but she continues to defy him. George's anger knows no bounds when Tulkinghorn breaks his promise and leaves him in financial ruin. And a marriage proposal surprises Esther - but is it from the right man?

Richard is in dire straits but Ada and Esther may be too late to help him. An unexpected meeting with Woodcourt raises uncomfortable questions for Esther. Jo the crossing sweeper is critically ill, and despite Woodcourt's best attempts it is a matter of life and death. Tulkinghorn discovers Lady Dedlock's defiance with disastrous consequences.

Esther's feelings for Woodcourt grow stronger despite her best intentions. Inspector Bucket begins his murder investigation with no shortage of suspects. An early arrest appears to wrap the case up quickly, but a spate of poison pen letters suggests that all is not as it seems.

Richard and Ada's news causes great concern for Esther and Jarndyce. Inspector Bucket's investigation gathers steam when he tracks down the mysterious letter writer. As evidence mounts against Lady Dedlock, Bucket sets a trap for the killer - with astonishing results.

As Bucket wraps up his investigation, there's yet more trouble for Lady Dedlock in the shape of the evil moneylender Smallweed, who has evidence of her secret past and intends to use it. Cornered and desperate, Lady Dedlock makes a terrible decision.

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.