In a case centered around the fledgling world of psychiatry, a unhappy psychiatric patient is on the loose, leaving behind a cuddle, a mystery and an unidentified body. Blake hires Eliza to help him solve the case.

The divorce of a high society couple causes scandal when their settlement becomes public and their prize racehorse goes missing. The horse has disappeared from its stable and each party blames the other. It's a case with blackmail, cuddle and two people at its center who hate each other. Is it a warning for Eliza and Blake about what could happen to them?

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. But 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 passing 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.