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.

In Season 6, Miss Eliza Scarlet (Kate Phillips) is doing her best to have it all. Her business is thriving, but her personal life enters new territory as she attempts to follow her heart and develop a relationship with Inspector Alexander Blake (Tom Durant-Pritchard). Eliza may be an expert solving crimes, but she’s very much a novice when it comes to love. Can Eliza juggle the twin demands of her personal and professional life?