When Eliza Scarlett's father dies suddenly, she's faced with a stark choice. Accept the fact she is now penniless or take on and run her dad's detective business, but can she succeed against all the odds in this male-dominated world?

As London's only female detective, Eliza is struggling to get work. Desperate for money, she takes a seemingly impossible case; proving the innocence of a man found at a murder scene with a bloodied knife in his hand who has pleaded guilty.

The Duke hires Eliza to spy on suffragettes. Going beyond her instructions, she gets involved in Britain’s biggest plot since Guy Fawkes.

Eliza and Nash are still struggling to work together when an explosive case takes them into a cutthroat industry where people will kill to keep their secrets.

When a magician vanishes into thin air, Eliza is hired to investigate, despite the fact that Duke is already on the case.

Detective Fitzroy sees one of his colleague's plant evidence on a suspect. With Duke away, Fitzroy turns to Eliza for help.

Eliza teams up with Duke to investigate a burglary in a high-end brothel whose clients include important members of the British government.

When a close friend of Mr. Potts is murdered, Eliza finds herself investigating the dark and macabre world of Victorian undertakers.

Eliza is hired by Scotland Yard to find a missing Lord accused of murdering his maid, but when the new Detective Inspector arrives, he removes Eliza from the case. DI Blake has his own rule about not using private detectives and Eliza now has a fight on her hands to convince the new boss that she is an invaluable resource.

A post-mortem portrait photographer gets messages from beyond the grave. Eliza’s investigation takes her into the spirit world.

The sister of a missing woman hires Eliza to find her, but when the case is closed by the police, new tensions are created between Eliza and the Duke.

A valuable sketch by the late Charles Darwin has been stolen and Eliza is hired by an insurance company to find it, but a twist soon emerges.

Eliza is forced into hiding when she is the prime suspect in a series of break-ins at city mortuaries. While Duke tries to find other suspects, Eliza turns to Moses for help.

Eliza is hired to solve a case of blackmail in the shady world of Victorian medicine, and finds herself with a new rival-Patrick Nash, the owner of a large private detective agency who wants to hire her or crush her agency.

A famous mystery writer is at the centre of Eliza's investigation when a series of murders copy scenes in his books. Meanwhile, the Duke is also juggling problems at work with a new superintendent and a troubled young detective.

Eliza bumps into the girl who made her life a misery growing up. Eliza suspects she may be a criminal, but no one wants to hear it.

Eliza is on the trail of a fugitive who is charged with murder. She must find him before the police do or risk losing everything.

The all-powerful Guild of Private Detectives take an instant dislike to the new Inspector Blake because of his ban on the use of Private Detectives at Scotland Yard. But when the Chairman of the Guild turns up dead, Blake finds himself working alongside Eliza whether he likes it or not. Meanwhile, Ivy takes on a new opportunity, but what will the consequences be for her engagement to Mr. Potts?

Eliza is on the verge of earning life-changing money when she offers to help the heir to an unclaimed fortune.

Things are going well for Eliza until a familiar face shows up to question her role at Nash & Sons. Meanwhile, Duke receives an offer that brings their relationship to a crisis point.

Searching for the secret to her father’s fate, Eliza goes to an abandoned prison. Eliza and the Duke stumble on a criminal enterprise.

Eliza tracks down a notorious conman in a remote part of France, but she’s not the only one who wants to claim the reward.

With a notorious serial killer on the loose Eliza is caught in the middle of a clash between Fleet Street and Scotland Yard.

Patrick Nash finds himself unexpectedly enjoying an early release from prison, but he must complete an impossible task or get thrown back in jail; Ivy's career is gaining strength, but it may put her marriage plans in jeopardy.

When Eliza receives a bomb in the mail, she teams up with Duke, Moses and her old enemy Patrick Nash to find out who is behind the delivery.