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.

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.