In Season 3, Eliza finds herself investigating more fresh and surprising mysteries, ranging from a disappearing magician to police corruption, as she struggles to build her detective agency. Growing competition from a rival agency creates new problems, and all the while she is still juggling her relationship with Inspector William Wellington, the Duke.

Eliza is on the verge of earning life-changing money when she offers to help the heir to an unclaimed fortune. It’s a race against time to claim the money and Eliza will need Duke’s help, but a revelation about his personal life makes working together impossible.