Young orphan Esther Summerson is brought to the High Court of Chancery, where she is thrown together with two wards of the court, Richard Carstone and Ada Clare. Both are caught up in the infamous suit of Jarndyce and Jarndyce, which brings nothing but ruin and despair to all it touches. Esther, Richard and Ada are sent to live at Bleak House, where they receive a friendly welcome from their rich guardian John Jarndyce.

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.

George's future is put at risk as Tulkinghorn uses the evil moneylender Smallweed to pile on the pressure. Guppy makes a discovery about Esther which shocks Lady Dedlock to the core. Esther and Jarndyce take in Jo the crossing sweeper, who is seriously ill and on the run from Tulkinghorn's men. But their kindness produces an unexpected result.

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.

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.