The new drawing mistress feels inquisitive eyes upon her as she arrives to take up her post at the House of Roxburgh. Despite the cavalcade of respectable guests at the house, quickwitted ex-street urchin Molly begins to suspect that darker secrets lurk in the gardens. Meanwhile, in London's East End, a body tumbles from a ship. Sergeant Lawless unearths connections between a newly arrived aristocrat, an unfortunate fire, and a mysterious vanishment.