Margaret Wells's business comes under attack from a rival madam. As they risk losing everything, how much will Margaret and her daughters have to sacrifice to keep the brothel, and the Wells family afloat?.

When an old friend arrives in town, Margaret's hopes for the Soho move rest on whether she can tempt him to invest, while Justice Cunliffe makes Lydia an intriguing offer.

Lucy is hired to spend a few days with Lord and Lady Repton, but they have peculiar tastes, while Margaret fears she may be reaping the reward of her public attack on Lydia Quigley.

Margaret's debts mount in the face of Lydia's campaigns against her and Florence's religious tirades, while Charlotte helps to introduce Lucy to the highest echelons of society.

Emily is brutally punished after Lydia catches her trying to escape, while Margaret is thrilled when Lord Fallon shows interest in Lucy, and Amelia's new friendship with Violet blossoms. Charlotte is also on the hunt for a new keeper and is determined to leave Howard, but events take a horrifying turn when Haxby discovers her intentions.

Margaret is delighted when Howard offers to be Lucy's keeper, Fanny makes an announcement that could threaten her position in the house, while Nancy is determined to keep Emily Lacey out of Lydia's clutches.

North and Jacob have gone missing, and after the events of the previous night, Margaret is desperate to find them. But when her friends discover her betrayal of Emily, Margaret will have to search alone. Lydia can finally take her revenge on Emily, who finds herself in terrible danger. Nancy will have to race against time to find her - though help comes from the most unexpected quarter. Charlotte and Marney are planning a future in America, but when a discovery is made, all three Wells women fear they will come under suspicion. With Margaret's daughters in peril, can she find a way to save them all?

After Rasselas' revelation, Lydia can put everything in place to take down Margaret Wells once and for all. But she'll need Cunliffe's help and her discovery that Emily has escaped could bring her plans crashing down. If Cunliffe has now become her enemy, Lydia must act quickly to deal with the threat. Which of them can earn the Spartans' trust? Harriet and North unite in one final attempt to steal her children back from Benjamin Lennox. Lucy learns a new skill which could change her future. Will Margaret make a decision for Fanny that's popular in the house?