Sue's Unconventional Upbringing and a Tempting Offer
Susan Trinder, known as Sue, tells about her early life in a London lodging house run by Mrs. Sucksby, a baby-farmer and receiver of stolen goods. Raised among thieves, Sue learns the trade and sees Mrs. Sucksby as her mother. One day, a man named Richard Rivers, or 'Gentleman,' approaches Mrs. Sucksby with a plan. He intends to marry a wealthy heiress, Maud Lilly, who lives on her uncle's estate, then have her committed to an asylum to take her fortune. He needs a 'fingersmith' to act as Maud's maid, earn her trust, and help him carry out the plan. Sue, despite her initial doubts, agrees, seeing it as a way to secure a good future for herself and Mrs. Sucksby.
Arrival at Briar and the Peculiar Household
Sue travels to Briar, the isolated country estate where Maud Lilly lives with her eccentric uncle, Christopher Lilly. Posing as a respectable maid, 'Susan Smith,' Sue starts her new job. The house is a maze of dusty rooms, and Maud is a quiet, reserved young woman, seemingly trapped by her uncle's studies. Mr. Lilly is a reclusive book collector, obsessed with his large collection of rare and often pornographic books. He makes Maud help him in his library, copying and reading aloud passages from these illicit texts for potential buyers. Sue watches the strange relationship between uncle and niece, feeling pity for Maud, even as she works towards betraying her.
A Deepening Bond and Shifting Loyalties
As Sue spends more time with Maud, their relationship develops. Maud, at first cold, slowly confides in Sue, sharing her loneliness and her dislike for her uncle and his degrading work. Sue feels drawn to Maud's vulnerability and intelligence, and their bond grows into an unexpected closeness. Sue starts to question the ethics of her part in Gentleman's plan, struggling with her loyalty to Mrs. Sucksby and her growing feelings for Maud. She feels a deep conflict, torn between the promise of wealth and the love she feels for the heiress she is meant to betray.
The Wedding and the Betrayal
The wedding day arrives. Gentleman, having won Maud over, marries her in a quiet ceremony. Soon after, the plan to commit Maud to an asylum begins. Sue, playing her role, helps to 'subdue' Maud, who seems to have a mental breakdown. Maud is then taken away, supposedly to a private asylum. Sue, believing she has finished her task and secured Maud's fate, returns to London with Gentleman, expecting her share of the fortune. However, a sense of unease starts to bother her, as she deals with the guilt of her actions and the strong memories of Maud's distress.
Sue's Confinement and the Shocking Revelation
Upon returning to Mrs. Sucksby's house, Sue is drugged and wakes up locked in a padded cell, in what appears to be a private asylum. She is horrified and confused, believing Gentleman and Mrs. Sucksby betrayed her. During her confinement, she slowly puts together information and overhears conversations that reveal a shocking truth: she is not Sue Trinder, the fingersmith, but Maud Lilly. The woman she thought was Maud was actually Sue Trinder, the real fingersmith, who had swapped places with her. The entire scheme, including her upbringing, had been an elaborate deception by Mrs. Sucksby and Gentleman to secure the inheritance for the real Sue.
Maud's Perspective: The Truth Unfolds
The story then switches to Maud's view, showing her life before Sue arrived. Born to a wealthy mother who died in childbirth, Maud was raised by her eccentric Uncle Lilly, who used her for his pornographic library. He taught her to read and write, specifically to help him with his illicit trade. Maud reveals she knew about Gentleman's plan and had been involved from the start. She had met the real Sue Trinder weeks before the 'switch,' and they had planned to swap identities, with Maud posing as Sue and Sue posing as Maud, to escape their oppressive lives and claim the fortune. Maud's seemingly helpless manner was an act.
The Plan's Execution and Maud's Escape
Maud, now free from the asylum and posing as Sue Trinder, returns to Mrs. Sucksby's house. She confronts Mrs. Sucksby, who, despite her part in the deception, truly cares for both girls. Maud learns more about her true parents and the complex web of lies that defined her life. She discovers her mother was Mrs. Sucksby's sister, and Mrs. Sucksby had been involved in a previous scheme with Uncle Lilly concerning Maud's inheritance. Maud, now knowing the full truth and with her new freedom, begins to navigate the world outside Briar and the asylum, seeking justice and a new beginning.
A Confrontation and a Reckoning
Maud, disguised as Sue, confronts Gentleman, who is now living off the inheritance he believes he has. She reveals her true identity and the full extent of the deception, exposing his villainy. She also confronts her Uncle Lilly, making him acknowledge his abuses and the truth about her mother's past. The confrontation is tense, as Maud, no longer timid, stands firm. The complex web of lies, betrayals, and hidden motives starts to unravel, leading to a dramatic moment where the true villains are exposed and some justice is sought. The old system of manipulation and exploitation begins to break down.
Reunion and Reconciliation
After their separate experiences and discoveries, Maud and Sue reunite. Sue, released from the asylum (after Maud's help and the scheme's exposure), is at first confused and angry. Their reunion is full of betrayal, hurt, and lingering affection. Slowly, through honest talks and shared understanding of their manipulation, they begin to heal the wounds from the deception. They reconcile, recognizing the depth of their bond and the unique circumstances that brought them together. Their love, formed in deceit, becomes stronger and more genuine.
A New Beginning
With the various schemes dismantled and the truth known, Maud and Sue are free to make their own way. They decide to leave their pasts behind and build a new life together. The inheritance, now theirs (or a portion of it, after everything settles), gives them the means to live independently. Their journey is one of healing, trust, and rebuilding. The novel ends with them starting a future together, having found not only love but also a deep sense of belonging and family in each other, leaving behind the shadows of Briar and the London slums.