In teeming Victorian London, where lavish wealth and appalling poverty live side by side, Edward Pierce charms the most prominent of the well-to-do as he cunningly orchestrates the crime of the century. Who would suspect that a gentleman of breeding could mastermind the daring theft of a fortune in gold? Who could predict the consequences of making the extraordinary robbery aboard the pride of England's industrial era, the mighty steam locomotive?...

"He is first and foremost--at everything. A man who's made his own way through ruthless cunning and sheer force of will. A strong and imposing Scot who can turn on the charm but does not suffer fools. His title: Lord Chief Justice of the High Court. His name: Cassius Gerard Ramsay. His mission: To investigate the goings-on at London's most notorious gaming hell, owned and operated by one of the most intriguing and desirable women he's ever met. Cecelia...

Growing competition from a rival agency creates new problems for Eliza's budding business, and competition from her childhood friend creates problems for her relationship with Inspector Wellington.

In Miss Scarlet and The Duke Season 4, Eliza has taken over the business of Nash & Sons (not that he has any sons) and things are not going entirely smoothly, although help comes from some familiar sources. Outside of work, her relationship with William 'The Duke' Wellington builds towards a looming decision that will shape both their lives.