Tensions rise when Caroline organises an outing for Lady Maria and Anne, which sees the women compromised. Susan's indulgent behaviour catches up with her, and Ellis begins to show her true colours.
A jealous Oliver threatens to ruin the lives of many as he makes a shocking discovery. Meanwhile, some of the Trenchard staff receive an offer too good to refuse.
The Trenchard family have recently ascended to the aristocratic society of London's Belgravia, but a decades-old love affair comes back to haunt them and jeopardise the happiness of many.