| A young woman is hired as a maid to an heiress who lives a secluded life on a large countryside estate with her domineering uncle. But, the maid has a secret: she is a pickpocket recruited by a swindler posing as a gentleman to help him seduce the heiress to elope with him, rob her of her fortune, and lock her up in a madhouse. The plan seems to proceed according to plan until the women discover some unexpected emotions. |
| Name | Character | Episodes |
|---|---|---|
| Michelle Dockery | Betty | 3 |
| Charles Dance | Mr. Chistopher Lilly | 3 |
| Imelda Staunton | Mrs. Sucksby | 3 |
| Sally Hawkins | Sue Trinder | 3 |
| Polly Hemingway | Mrs. Stiles | 3 |
| Elaine Cassidy | Maud Lilly | 3 |
| Rupert Evans | Richard 'Gentleman' Rivers | 3 |
| David Troughton | Mr. Ibbs | 3 |
| Richard Durden | Mr. Hawtrey | 3 |
| Sarah Badel | Mrs. Frobisher | 3 |
| Bronson Webb | John Vroom | 3 |