A psychiatric patient escapes after a killing, leaving a mystery and unknown corpse. Blake enlists Eliza's help to investigate.

A divorcing elite couple's scandal deepens when their settlement leaks and their racehorse vanishes. Each spouse accuses the other amid blackmail and murder, serving as a possible warning to Eliza and Blake.

A treasure hunt brings Moses back to London from Paris to sell a priceless diamond. As Eliza welcomes Moses back to the fold, Clarence is determined to prove that he is every bit as good as his predecessor and a friendly rivalry ensues.

Charlie Phelps, the new Detective Inspector at the City of London Police, hires Eliza for a case involving his uncle, Dylan Cooper. It turns out that Scotland Yard is also after Cooper who has committed crimes in both jurisdictions, leaving Eliza in the middle.

Dylan Cooper has been nabbed and is being held in the cells at Scotland Yard. His gang wants to spring him out, which will lead to a long night for Blake and new detective George Willows.

When the mysterious death of a foreign ambassador sparks political intrigue, Eliza is called to investigate – this time, at the request of the formidable Governess. Tasked with solving the case alongside Inspector Blake, Eliza finds herself working with a woman whose power and intellect mirror her own.